Panasonic AN8014S Manual
Contents
1. Z 1000 E 2 49 Rr 5 1 KQ 2 E o 100 5 9 Rr 15 KO hz 3 8 a Es 10 2 o 1 Voeden 10 00 000 10 000 Timing capacitance Cr pF Oscillator frequency four kHz Output duty ratio Du Output peak current Ipeak A Oscillator frequency temperature characteristics 225 220 215 210 205 200 50 25 0 25 50 13 100 125 Ambient temperature T C Output duty ratio temperature characteristics 56 wn a Ambient temperature T C Output peak current Cout 0 6 Voe 12 V Rour 10Q 0 5 0 4 0 3 0 2 0 1 0 LE EE EE EE 1 000 5 000 10 000 Value of output connection capacitor Cour pF 16 Panasonic Voltage regulators AN8014S B Application Circuit Examples 1 DC DC converter control Example of step down circuit In Wee Out 3 9 KQ LN 1 d d LL 100 uF 332 T Vi 0 1 uF 0 039 uF 9 1 KQ 75 KQ 1000pF LLL 47 uF ra T L 120 pF 15kQ Q A 5 D amp 200 kHz S100 Constant CLM current source OFF On off V OFF 5 Vee E n CB I E 3 Latch Q SCP s S2. F IN a 100 KO Zuka a a m 6 6 z 7 amp TIT 2 DC DC converter control Example of step up circuit Triangular H wave OSC Constant current source On off active high 1 HA jo uA 4 Q U V L O S Q R Latch Q S PGND Panasonic 17 AN8014S Voltage regulators B Application Circuit Examples continued 3 DC DC converter control Example of polarity inverting circuit VREF 9 E E a O Vi gd LL Triangular wave OSC Constant current source On off active high 1 nal 10 HA Q U V L O S Q R C C Latch Q is Error amp Yi N SGND PGND 18 Panasonic
3. Vore 0 8 V In standby mode the total current consu mption is held to under 10 uA E Application Notes 1 Function descriptions 1 Reference voltage block This block is composed of the band gap circuit and outputs the temperature compensated reference voltage 2 6 V to the Vrrr pin pin 1 The reference voltage is stabilized when the supply voltage is 3 6 V or more and used as the operating power supply in IC It is possible to take out a load current of up to 1 mA Panasonic 7 AN8014S Voltage regulators E Application Notes continued 1 Function descriptions continued 2 The triangular wave generator block OSC The triangular wave which swings from approximately 1 32 V upper limit value Voscg to approximately 0 44 V lower limit value Voscr will be generated by connecting a timing capacitor Cr and a resistor Ry to the Cr pin pin 3 and Ry pin pin 2 respectively Oscillator frequency can be freely decided by the value of Cr and Ry connected externally The oscillator frequency fosc is obtained by the following formula 1 TS RING EE ate Vern 1 32 V typ fosc tjt t 2x Cr X Verg Veur Ver 0 4 lo 1 7 x Rr 1 7 x Rr Because Very Ver 0 88 V MN T AE Z cag 0 44 V typ fosc 359xC xR M ge En PEL NN Charging Discharging Example An fosc of approximately 215 kHz will be a obtained if Cr is 120 pF and RT is 15 KO Figure 1 Triangular oscillation
4. Icgg is constant current which is determined by the timing resistor Ry If Rr is 15 KO long will be approximately 2 3 MA Icuc x A When the external capacitor Cs is charged up to approximately 0 75 V the latch circuit will be turned on Then the totem pole output pin will be set to low level and the dead time will be set to 100 When the latch circuit is turned on the S C P pin will discharge electricity till the voltage on the S C P pin reduces to approximately 30 mV The latch circuit cannot be however reset until power supply to the AN8014S is turned off a VREF S Q IN 6 R Q Latch Cut output off Figure 3 Short circuit protection circuit 5 Low input voltage malfunction prevention circuit U V L O This circuit protects system from breakdown or deterioration caused by malfunction in control circuit when supply voltage is dropped during transient time at power on or off The low input voltage malfunction prevention circuit detects internal reference voltage which changes in accordance with the supply voltage level When the supply voltage is turned on it sets the dead time of Out pin pin 13 to 100 and keeps the DTC pin pin 4 and S C P pin pin 5 low level until the supply voltage reaches 3 1 V When the supply voltage falls it will operate even below 2 96 V because of its hysteresis width of 140 mV Panasonic 9 AN8014S Voltage regulators B Application Notes continued 1 Functio
5. 40 mA Error amplifier block Output sink current Iswk Veg 0 9 V 8 mA Output source current Isource Vreg 0 9 V 110 HA Open loop gain Ag 70 dB Output block Frequency supply voltage fav four 200 kHz t3 characteristics Vcc 3 6 V to 34 V Frequency temperature fani four 200 kHz 9 characteristics 1 T 30 C to 25 C Frequency temperature farz four 200 kHz t9 characteristics 2 T 25 C to 85 C Oscillator block RT pin voltage Ver 0 4 V Short circuit protection circuit block Comparator threshold voltage Vry m 1 87 V Overcurrent protection circuit block Delay time Dry 200 ns Panasonic Voltage regulators B Terminal Equivalent Circuits Pin No 1 0 Equivalent circuit 1 o Vee d VREF AN8014S Description VREF Outputs the reference voltage 2 6 V allowance 3 Incorporating short circuit protection against ground 2 V RT t Connection for the timing resistor which An decides the oscillator frequency Use a re 9 sistor in the range 5 1 kQ to 30 kO The pin voltage is approx 0 4 V DTC SCE 100 Q TIT RT 0 4 V 3 V CT Sem T j Connection for the timing capacitor which To PWM input 9 9e Ig decides the oscillator frequency Use a ca EN pacitor in the range 100 pF to 10 000 pF i OSC CT For the oscillator frequency setting refer comp 9 to the Application Notes 1 F
6. of the n channel MOSFET is grounded Therefore short circuit the CB pin pin 14 and the Vcc pin pin15 Thus the operating supply voltage range in the step up circuit method is between 3 6 V and 34 V Panasonic 13 AN8014S B Application Notes continued 3 Timing chart Supply voltage Voc OFF pin voltage Voltage regulators Error amplifier output FB 1 Internal reference voltage Power supply turning on Triangular wave CT DTC pin voltage S C P pin voltage Out pin waveform Software start operation The maximum duty Figure 1 PWM comparator operation waveform Internal reference voltage Short circuit protection comparator threshold level DTC pin voltage Error amplifier output FB Triangular wave CT Out pin waveform S C P pin voltage Short circuit protection comparator output Figure 2 Short circuit protection operation waveform 14 Panasonic High Low 3 6 V 2 6 V 1 87 V 1 32 V 0 44 V 0 03 V High Low 2 6 V 1 87 V 1 32 V 0 44 V High Low 0 75 V 0 03 V High Low Voltage regulators AN8014S B Application Notes continued 3 Timing chart continued Output off Turned on in the next cycle _ Triangular w
7. or below due to capacitive coupling Then the M1 will be in the state described in the above 1 2 Bootstrap circuit usage notes 1 Operating voltage range for step down circuit Just like what described previously if a step down circuit is in DC DC converter control the CB pin pin 14 voltage will be approximately twice as high as Vcc when the n channel MOSFET as a switching element is turned on The allowable voltage applied to the CB pin is 35 V Therefore the operating supply voltage must be within a range between 3 6 V and 17 V VeB 2X Vcc Vpi Vos on Vr lt 35 V 35 Vp Vps on 2 2 Value setting of bootstrap capacitor Vr Vec lt V lt 17 V The bootstrap capacitor raises the CB pin voltage to Vcc or higher due to capacitor coupling to the source side of the n channel MOSFET when the n channel MOSFET is turned on At that time bootstrap capacitor is dis charged by n channel MOSFET gate drive current If the capacitance of the bootstrap capacitor is too low an increase in switching loss will result which will reduce the efficiency Therefore the capacitance must be large enough in comparison with the gate input capacitance of the n channel MOSFET Refer to the following Cp gt Ci Determine the best value by testing on the printed circuit board for mounting 3 CB pin connection for step up circuit If a step up circuit is in DC DC converter control no bootstrap circuit is required because the source side
8. 0 pF Ry 15 KQ 196 218 240 kHz Output duty Du Rprc 75 KQ 47 52 57 Low level output voltage Vor Io 70 mA 1 0 1 3 V High level output voltage Vou Io 70 mA Vcg Ven V 2 0 1 0 Bootstrap circuit block Input standby voltage Vince Icg 70 mA Vcc Vee Vee V Short circuit protection circuit block Input threshold voltage Vrypc 0 70 0 75 0 80 V Input standby voltage VsrBy 30 120 mV Input latch voltage Vin 30 120 mV Charge current Tena 2 76 2 30 1 84 HA On off control block Threshold voltage Vry 0 8 2 0 V Overcurrent protection block Threshold voltage VoM Vee Vee Vee V 0 115 0 095 0 075 Panasonic 3 AN8014S Bi Electrical Characteristics at Voc 12 V T4 25 C continued Voltage regulators Parameter Symbol Conditions Min Typ Max Unit Whole device Total consumption current Icc 5 0 7 0 mA Standby current IccsB 5 uA e Design reference data Note The characteristics listed below are theoretical values based on the IC design and are not guaranteed Parameter Symbol Conditions Limit Unit Reference voltage block Output voltage temperature Vra Ta 30 C to 25 C t1 characteristics 1 Output voltage temperature Vra T 225 C to 85 C 1 characteristics 2 Output short circuit current Tos
9. PGND Panasonic 1 AN8014S B Pin Descriptions Voltage regulators Pin No Description Pin No Description 1 Internal reference output 9 Not connected 2 Oscillator timing resistor connection 10 Overcurrent protection input 3 Oscillator timing capacitor connection 11 Signal ground 4 Dead time control 12 Output stage ground 5 Capacitance connection for short circuit 13 Totem pole type output protection delay 14 Bootstrap output 6 Error amplifier noninverting input 15 Supply voltage 7 Error amplifier inverting input 16 On off control 8 Error amplifier output E Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage Voc 35 V Supply current Icc m mA Power dissipation Pp 143 mW Operating ambient temperature Tope 30 to 85 C Storage temperature Tie 40 to 125 a On off pin allowable application voltage V on off Vcc V Error amplifier allowable input voltage Vi 0 3 to VREF V DTC pin allowable application voltage Vprc 0 3 to VREF V Out pin allowable application voltage Vour 35 V Out pin constant output current Io 100 mA Out pin peak output current Topeak 1 000 mA CB pin allowable application voltage Vos 35 V CB pin constant output current Ica 100 150 mA CB pin peak output current Icpp 500 1 000 mA CLM pin allowable application voltage VeLM Vee V Note 1 1 Except for the operating ambient temperature and storage tem
10. VOR Ends Panasonic AN8014S Step down step up or inverting DC DC converter control IC E Overview Unit mm The AN8014S is a single channel PWM DC DC converter control IC 6 This IC can provide any one output type from H H H H H H among step down step up and inverting output 10 1 0 3 Allowing n channel power MOSFET direct driv ing the AN8014S is ideal for high efficiency power supplies 0 to 10 E Features S e Wide operating supply voltage range 3 6 V to 34 V 5 The voltage is limited within a range between 3 6 V and 17 V if it is connected to a step down volt age circuit Totem pole output circuit output peak current 1 A On chip pulse by pulse overcurrent detection and SOPO016 P 0225A protection circuit Threshold voltage Voc 0 095 V typical On chip bootstrap circuit allowing n channel MOSFET direct driving On chip under voltage lock out circuit U V L O e On chip on off function active high control input standby current of maximum 5 HA On chip timer latch short circuit protection circuit Maximum oscillator frequency 500 kHz B Applications e DC DC switching power supply Bi Block Diagram 5 9 gt A Constant CLM current source R Q Vee S Q CB R M Out Latch Q gt S IN S C P SGND
11. ave CT uem Error amplifier output FB Out pin waveform Overcurrent protection input CLM 1 L AQ Jet 4 Vec 95 mV lt tpLy Delay time Latch circuit reset signal Latch reset Figure 3 Waveforms of the pulse by pulse overcurrent protection operation 4 Pp Ta curves of SOP016 P 0225A a 600 Glass epoxy printed circuit board 50 mm x 50 mm x t0 8 mm Raj 263 C W Pp 380 mW 25 C Independent IC without a heat sink Ru 278 C W Pp 360 mW 25 C Power dissipation Pp mW 207 200 143 N VK 100 NUS SN MN N SN 0 0 25 50 75 85 100 125 150 Ambient temperature T C Panasonic 15 AN8014S Voltage regulators B Application Notes continued 5 Main characteristics Internal reference voltage temperature characteristics 2 63 Internal reference voltage Veer V 50 25 0 25 50 75 100 125 Ambient temperature T C Output duty ratio DTC pin voltage 100 80 S 5 A og 2 E El S 40 5 amp 5 6 20 0 04 0 6 0 8 LO 12 14 DTC pin voltage Vprc V Oscillator frequency Timing capacitance 10 000
12. current is approx 8 mA Correct the frequency characteristics of the gain and the phase by connecting a re sistor and a capacitor between this pin and IN pin N C Not connected CLM Panasonic CLM Detects the overcurrent state in switching transistor Insert a resistor with a low resistance between this pin and Vcc to detect overcurrent states When this pin falls to a level 95 mV or more lower than Vcc the PWM output is turned off for that period thus narrowing the width of the on period This implements a pulse by pulse overcurrent protection technique Voltage regulators AN8014S B Terminal Equivalent Circuits continued Pin No I O Eauivalent circuit Description 11 SGND Signal ground 1 SGND 12 GND Output stage ground GND 13 Oo Out Totem pole output Vee t A constant output current of 100 mA or a v peak output current of 1 A can be ob EIS CB tained 14 o K CB Bootstrap output out Connect a bootstrap capacitor between K this pin and the n channel MOSFET source side pin of the switching element when e TIT using a step down voltage circuit Short circuit this pin and the Vcc pin when using a step up voltage circuit 15 I Voc Power supply 16 I OFF Controls the on off state OFF 17 KO When the input is high normal operation n VorF gt 2 0 V 13 kQ When the input is low standby mode
13. e Vcg on the CB pin pin 14 is expressed by the following Vs Vr Vcg Vee Vpi Vr Forward voltage of SBD Vp Forward voltage of D1 Therefore the charged voltage of bootstrap capacitor Cp is expressed by the following Vcg Vs Vee Vp Vr 12 Panasonic Voltage regulators AN8014S E Application Notes continued 1 Function descriptions continued 9 Bootstrap circuit of output block continued 2 N channel MOSFET M1 turn on time t When the PWM comparator output is inverted the Out pin pin 13 output changes into a high level The Out pin voltage Vo rises toward the CB pin voltage Vo Ver Ver sat Then the voltage between the gate and source of the MI is obtained from the following Vos Vo Vg When the Out pin voltage Vo is the same as or higher than the gate threshold voltage Vry the M1 turns on Then the M1 source side voltage rises up to the voltage expressed by the following Vs Vee VpSON The bootstrap capacitor Cg is connected to the source side and CB pin of the M1 Therefore the CB pin voltage rises according to the M1 source side voltage due to capacitor coupling Vcg is expressed by the following formula Vcg Vs Vee Voi Vr 2 X Vcc Vpi Vpson Vr 3 N channel MOSFET M1 turn off time t4 The Out pin voltage turns off after rising to the saturation voltage of the AN8014S s internal transistor Q1 The MI source side voltage drops to Vr The CB pin voltage drops to Vee Vp
14. he upper limit of the current flowing in the main switch thus protects the parts such as main switch device a flywheel diode and a choke coil from the damage caused by the overcurrent The current detection are done by monitoring at CLM pin pin 10 the voltage drop in resistor which is placed between the main switch device and Vec pin When the main switch device power MOSFET is switched on and the voltage of CLM pin reaches Vcc 95 mV threshold level for overcurrent detection the output drive transistor is cut off so that no more current flows in the main switch device This control is repeated at each cycle When overcurrent is detected once the transistor remains off during the same cycle and is switched on in the next cycle Such an overcurrent detection method is called Pulse by pulse overcurrent detection 3 Output Off 5 Turned on in the next cycle Triangular wave CT Error amplifier output FB Output waveform Out Overcurrent protection input CLM 2 Latch set Latch circuit set signal Latch circuit reset signal 4 Latch reset Figure 5 Waveforms of the pulse by pulse overcurrent protection operation R2 and C1 shown in figure 6 constitute a low pass filter to eliminate noise due to parasitic capacitance when L Cl R2 the power MOSFET is turned on o In a ar o Out Ri Ll The cut off freq
15. n descriptions continued 6 Remote circuit 10 It is possible to switch on or off the IC control by using an external control signal When the OFF pin pin 16 voltage is lowered to below approximately 0 8 V the internal reference voltage goes down thereby stopping the IC control and reducing the circuit current to 5 HA or less When the OFF pin voltage is increased to approximately 2 0 V or more the internal reference voltage rises thereby starting the control operation PWM comparator block The PWM comparator controls the on period of output pulse in accordance with the input voltage While the triangular wave voltage on the CT pin pin 3 is lower than both the error amplifiers output voltage on pin 8 and the voltage on the DTC pin pin 4 the output on the Out pin pin 13 will be set to high level Then the switching element n channel MOSFET will be turned on The dead time is set by adjusting the voltage Vprc on the DTC pin pin 5 as shown in figure 4 The DTC pin has constant current output determined by the resistor Ry Therefore Vprc is adjusted by connecting the DTC and GND pins through the external resistor Rprc When the oscillator frequency fosc is 200 kHz the output duty cycle will be 0 at Vprc of 0 44 V typical and 100 at Vprc of 1 32 V typical The levels of overshooting and undershooting of the peak value Verg and the trough value Ver of the triangular wave vary with the oscillator frequency VREF CT wavefo
16. oltage Vin and Vin to the error amplifier are obtained from the following formulas Vin VREE X R R R5 RO Vn Voi X R44 R4 i OT Figure 2 Connection method of error amplifier 8 Panasonic Voltage regulators AN8014S E Application Notes continued 1 Function descriptions continued 4 Timer latch short circuit protection circuit This circuit protects external main switching devices flywheel diodes choke coils and so forth from breakdown or deterioration when overload or short circuit of power supply lasts a certain time Figure 3 shows the short circuit protection circuit The timer latch short circuit protection circuit detects the output level of the error amplifier If the output voltage of the DC DC converter is stable the output of the error amplifier from the FB pin is stable and the short circuit protection comparator is well balanced In that case the transistor O1 is conductive and the C P pin voltage is approximately 30 mV constantly If the load condition changes radically and output signal voltage of the error amplifier FB is 1 87 V or higher the short circuit protection comparator outputs low level voltage Then by cutting off the transistor Q1 the external capacitor Cs of S C P pin pin 5 starts charging with the current Icyc which is obtained from the following formulas tpg Vre Vsray leno X G_ V s pg 0 75 V 20 03 V Icg X Cs Cs Icua X rs F
17. perature all ratings are for T 25 C 2 At T 85 C 2 Do not apply external currents or voltages to any pins not specifically mentioned For circuit currents denotes current flowing into the IC and denotes current flowing out of the IC B Recommended Operating Range Parameter Unit Supply voltage 3 6 to 34 V Step down circuit system Panasonic 3 6 to 17 Voltage regulators AN8014S Bi Electrical Characteristics at Voc 12 V T4 25 C Parameter Symbol Conditions Min Typ Max Unit Reference voltage block Output voltage Veer Ingg 1 mA 2 522 2 6 2 678 V Line regulation with input fluctuation Line Vcc 3 6 V to 34 V 16 25 mV Load regulation Load Iker 7 0 1 mA to 1 mA 1 10 mV U V L O block Circuit operation start voltage VUON 2 8 3 1 3 4 V Hysteresis width Vuys 60 140 180 mV Error amplifier block Input offset voltage Vio 6 6 mV Input bias current Ip 500 25 nA Common mode input voltage range Vicr 0 1 0 8 V High level output voltage Ven Veer Vggp V 0 3 0 1 Low level output voltage Vu ee 0 1 0 3 V Dead time control circuit block Input current Iprc 15 8 13 2 10 6 MA Low level input threshold voltage Vpr Duty 0 045 0 65 V High level input threshold voltage Vpr n Duty 100 1 2 1 4 m V Output block Oscillator frequency four Cy 12
18. rm AA KS Vern DTC waveform Iprc CT I PWM Y Figure 4 Setting the dead time Output duty ratio Du and DTC pin voltage Vprc are expressed by the following formulas ton Vore Ven X 1 1 Du x 100 96 x 100 9 ton torr el Vera 7 Ver X 1 1 0 V 1 br RX 7 A Rprc Vpre Iprc X Rprc Ver X Ee 7 V T Example When fosc 215 KHz Rr 15 KQ Cr 120 pF and Rprc 75 kQ Verg is approximately 1 32 V Very is approximately 0 44 V and Vr is approximately 0 4 V Therefore the following are obtained Ipre 13 3 HA Vprc 0 99 V Du 52 3 96 There may be an operational delay of the PWM comparator and a difference in peak and trough values of the triangular wave oscillation Discrepancies between the values obtained from the above formulas and the actual values may occur in which case adjust the values on the mounting substrate In starting if the capacitor Cprc is added in parallel to the external resistor Rprc and the output pulse width are gradually widened the AN8014S will be in soft start operation Thus the overshoot at the output of DC DC converters can be prevented Panasonic Voltage regulators AN8014S B Application Notes continued 1 Function descriptions continued 8 Overcurrent protection block Utilizing that the overcurrent of power output is proportional to the current value which flows in the main switch power MOSFET the block regulates t
19. uency of the filter is obtained from the following fc Hz 2TCIR V Out CLM Figure 6 CLM noise filter circuit Panasonic 11 AN8014S Voltage regulators E Application Notes continued 1 Function descriptions continued 9 Bootstrap circuit of output block If the n channel MOSFET is used as a switching device for DC DC converter control of step down method a bootstrap circuit is required Bootstrap circuit ensures that the gate source voltage is gate threshold voltage or higher by going up the high level of the Out pin pin 13 than Vcc voltage when n channel MOSFET turns on Figure 7 shows the output of bootstrap circuit including the external circuit Figure 8 shows the operating waveform of the bootstrap circuit MI MS o V Out PWM comparator CT DTC T FB gt Voc Voc Vps ow V CB pin waveform Vee 0 7 V Out pin waveform V OV M MI source side waveform t i t i t le Le 2 l MI Off MI On MI Off Figure 8 Bootstrap circuit operating waveform The following describes the operation of the bootstrap circuit 1 N channel MOSFET M1 off time t While the M1 is turned off the choke coil is provided with energy from the schottky barrier diode SBD and the source side voltage Vs of the M1 is fixed to V The bootstrap capacitor Cp is charged from the Vcc pin pin 15 through the AN8014S s internal diode D1 The voltag
20. unction n descriptions section Use an oscillator fre T Z lo quency in the range 5 kHz to 500 kHz 2 TIT TIT 4 DTC Cows comparator input lt ptc 2 Inte corc Rprc TIT Panasonic Connection for a resistor and a capacitor that set the dead time and soft start period of PWM output Input current Iprc is decided by the timing resistor Ry which controls sample to sample variations and temperature variations It is approx 13 2 HA when Ry 15 KQ Ver 1 Iptc Rr x5 A AN8014S B Terminal Equivalent Circuits continued Pin No 5 1 0 Equivalent circuit Voltage regulators Description S C P Connection for the capacitor that sets the soft start period and the timer latch short circuit protection circuit time constant Use a capacitor with a value of 1 000 pF or higher The charge current Icuc is decided by the timing resistor Ry which controls sample to sample variations and temperature varia tions It is approx 2 3 HA when R4 15 KQ Ver EX 1 I A CHO Ro TE IN Noninverting input to the error amplifier Use the common mode input in the range 0 1 V to 0 8 V IN Inverting input to the error amplifier Use the common mode input in the range 0 1 V to 0 8 V VREF l Sink current FB Output from the error amplifier The source current is approx 110 uA and sink
21. waveform It is possible to use the circuit in the recommended operating range of 5 kHz to 500 kHz of the oscillator frequency As the AN8014S is used at increasingly higher frequencies the amount of overshoot and undershoot due to the operation delay in the triangular wave oscillator comparator increases and discrepancies between the values calculated as described previously and the actual values may occur The output source currents of the AN8014S s S C P and DTC pins are determined by the timing resistor Ry which is externally connected to the RT pin Therefore note that this IC can not be used as an IC for slave when the several ICs are operated in parallel synchronous mode 3 Error amplifier block Detecting and amplifying DC DC converter output voltage the error amplifier with PNP transistor input inputs the signal to the PWM comparator Figure 2 shows the way to connect the error amplifier The common mode input voltage range is 0 1 V to 40 8 V and a voltage obtained by dividing the reference voltage with built in resistors is applied to the non inverting input Connecting the feedback resistor and the capacitor between the error amplifier output pin pin 8 and the inverting input pin pin 7 allows the arbitrary gain setting and the phase compensation Startup overshooting caused by feedback delays will be suppressed by setting the output source current and output sink current to as high as 110 LA and 8 mA respectively The input v
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Panasonic AN8014S Manual