FA7613CPE

FA7613CP(E) FA7613CP(E) s Description The FA7613CP(E) is a bipolar IC containing basic circuit necessary for PWM-type switching power supply control. The supply voltage range is from 2.5V. Bipolar IC For Switching Power Supply Control s Dimensions, mm SSOP-16 16 9 s Features • Low-voltage operation (VCC = 2.5 to 22V) • Open collector output • Latch-mode short-circuit protection function (no malfunction due to electrical noise) • Soft-strat function • Output ON/OFF control function • Low standby current (Max. 10µA) • Not many external discrete components needed 5.3 7.9±0.3 1 0.1±0.1 6.2 +0.1 8 0.2 –0.05 0~10˚ s Applications • Battery power supply for portable equipment 0.6 0.3 0.65 DIP-16 16 9 1 0.81 19.4 1.5 8 3.1min 4.3max 0.2min 3.4 6.5 .0 0.3 –0 +0.1 5 7.6 2.54±0.25 0.5±0.1 0~15 ˚ 0~1 5˚ s Block diagram Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin symbol Description — Reference voltage output(1.25V) Non-inverting input to error amplifier Inverting input to error amplifier Error amplifier output Dead time adjustment Ground — — Output Power supply Capacitor for short-circuit protection and delay Oscillator timing capacitor Oscillator timing resistance Output ON/OFF control — NC REF IN (+) IN (–) FB DT GND NC NC OUT VCC SCP CT RT ON/OFF NC 1 2.1max FA7613CP(E) s Absolute maximum ratings Item Supply voltage Reference voltage output current Output sink current Total power dissipation Operating temperature Storage temperature Symbol Rating 22 5 50 400 –20 to +85 –40 to +150 Unit V mA mA mW °C °C s Recommended operating conditions Item Supply voltage Feedback resistance Oscillator timing capacitor Oscillator timing resistance Oscillation frequency Symbol Min. 2.5 100 220 4.7 10 22,000 100 500 Max. 20 Unit V kΩ pF kΩ kHz VCC IOR ISINK Pd Topr Tstg VCC RNF CT RT fOSC s Electrical characteristics (Ta = 25°C, VCC = 5V, fOSC = 100kHz) Reference voltage section Item Output voltage Line regulation Load regulation Output voltage variation due to temperature change Symbol Test condition Min. 1.210 Typ. 1.235 1 5 –1 –1 Max. 1.260 5 10 1 1 Unit V mV mV % % VREF LINE LOAD VTC1 VTC2 IOR = 1mA VCC = 2.5 to 20V IOR = 0.1 to 1mA Ta = –20 to +25°C Ta = +25 to +85° C Oscillator section Item Oscillation frequency Frequency variation 1 (due to supply voltage change) Frequency variation 2 (due to temperature change) Symbol Test condition Min. 120 Typ. 140 2 4 Max. 160 Unit kHz % % fOSC fdV fdT CT = 1000pF, RT = 4.7kΩ VCC = 2.5 to 20V Ta = –20 to +85°C Error amplifier section Item Input bias current Symbol Test condition Pin 3 = 1.25V Pin 4 = 1.25V 70 1.0 RNF = 200kΩ 4.8 200 25 50 100 Min. Typ. 0.1 0.1 Max. 1.0 1.0 Unit IB+ IB– AV GB VOM+ VOM– IOM+ µA µA dB MHz V mV Open-loop voltage gain Unity-gain bandwidth Maximum output voltage (Pin 5) RNF = 200kΩ VOM = 1V Output source current (Pin 5) µA PWM comparator section Item Input threshold voltage (Pin 5) Input threshold voltage (Pin 5) Symbol Test condition Duty cycle = 0% Duty cycle = 50% Min. Typ. 0.80 1.13 Max. 0.90 Unit V V VTH0 VTH50 2 FA7613CP(E) Dead time adjustment circuit section Item Input bias current(Pin 6) Input threshold voltage (Pin 6) Input threshold voltage (Pin 6) Symbol Test condition Duty cycle = 0% Duty cycle = 50% Min. Typ. 0.3 0.10 0.47 Max. 1.0 0.20 Unit IBDT VTH DT0 VTH DT50 µA V V Short-circuit protection circuit section Item Input threshold voltage (Pin 5) Charge current (Pin 12) Latch-mode threshold voltage (Pin 12) Symbol Test condition Min. 2.05 Pin 12 = 0V, Pin 6, Pin 5 = 2V 15 0.90 Typ. 2.35 35 1.20 Max. 2.65 55 1.50 Unit V VTH PC ICHG VL µA V Output section Item L-level output voltage (Pin 10) Symbol Test condition Output sink current = 20mA Min. Typ. 1.0 Max. 1.5 Unit V VOL Output ON/OFF circuit section Item Input current (Pin 15) OFF-to-ON threshold voltage (Pin 15) Symbol Test condition Pin 15 = 5V Min. 0.5 0.6 Typ. 1.0 0.8 Max. 2.0 1.0 Unit mA V ION/OFF VTH ON Overall device Item Standby current Supply current Operating-state supply current Symbol I CC ST Test condition Pin 15 = 0V Latch mode Min. Typ. 0.5 1.5 2.0 Max. 10 2.5 4.0 Unit µA mA mA ICC LA ICC AV RL = ∞ Duty cycle = 50% s Characteristic curves (Ta = 25°C) Oscillation frequency (fOSC) vs. timing capacitor capacitance (CT) Output duty cycle vs. DT terminal voltage (VDT) CT [pF] Output duty cycle [%] fOSC (kHz) VDT [V] 3 FA7613CP(E) Output duty cycle vs. FB terminal voltage (VFB) L-level output voltage (VOL ) vs. output sink current (ISINK) Supply current (ICC ) vs. supply voltage (VCC) Error amplifier frequency (f) vs. voltage gain (AV ) Output ON/OFF control terminal input current (ION/OFF) vs. voltage(VON/OFF) I ON/OFF [mA] VON/OFF [V] VOL [V] 4 FA7613CP(E) s Application circuit Flyback-transformer type converter circuit Parts tolerances characteristics are not defined in the circuit design sample shown above. When designing an actual circuit for a product, you must determine parts tolerances and characteristics for safe and economical operation. Please connect a capacitor, which the value is about 0.01µF to 0.1µF, between VCC and REF terminals in order to prevent from irregular output pulse at start-up. 5