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FA3675F Dataheets PDF



Part Number FA3675F
Manufacturers Fuji Electric
Logo Fuji Electric
Description For Switching Power Supply Control
Datasheet FA3675F DatasheetFA3675F Datasheet (PDF)

FA3675F FA3675F s Description FA3675F is a control IC for 6-channel DC-DC converter. This IC can directly drive a Nch/Pch-MOSFET. This IC is suitable to reduce converter size because it has many functions in a small package LQFP-48. CMOS IC For Switching Power Supply Control s Dimensions, mm LQFP-48 9.0±0.3 7.0 1.45 max 0.10±0.06 25 s Features • 6-channel PWM control with MOSFET direct driving : 5-channel for Pch-MOSFET, 1channel for Nch-MOSFET • Low input voltage: 2.5V to 20V • ±1.0% high acc.

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FA3675F FA3675F s Description FA3675F is a control IC for 6-channel DC-DC converter. This IC can directly drive a Nch/Pch-MOSFET. This IC is suitable to reduce converter size because it has many functions in a small package LQFP-48. CMOS IC For Switching Power Supply Control s Dimensions, mm LQFP-48 9.0±0.3 7.0 1.45 max 0.10±0.06 25 s Features • 6-channel PWM control with MOSFET direct driving : 5-channel for Pch-MOSFET, 1channel for Nch-MOSFET • Low input voltage: 2.5V to 20V • ±1.0% high accuracy bandgap reference • Low power consumption by means of CDMOS Standby mode: 20µA(max.) Operating mode: 10mA(max.) • Soft start function for each channel • ON/OFF function for each channel • Timer latch for short protection • Undervoltage lockout • Wide range of operation frequency: 50kHz to 1MHz • Package: LQFP-48(Thin and small) 37 36 24 9.0±0.3 8.0 48 1 12 13 7.0 7.8 0.5±0.2 0.127 0~7 ˚ ±0.05 0.5±0.1 0.2±0.06 s Application • VTR-camera, digital-steel-camera and portable equipment 122 FA3675F s Block diagram 123 FA3675F Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Pin symbol Description Power supply for control circuit Oscillator timing resistor Oscillator timing capacitor Soft start for Ch. 3 & Ch. 4 Soft start for Ch. 6 Soft start for Ch. 5 Soft start for Ch. 1 Soft start for Ch. 2 Reference voltage output Capacitor for reference voltage output Regulated voltage output Ch. 2 inverting input to error amplifier Ch. 2 output of error amplifier Ch. 1 inverting input to error amplifier Ch. 1 output of error amplifier Ch. 5 non-inverting input to error amplifier Ch. 5 inverting input to error amplifier Ch. 5 output of error amplifier Ch. 6 inverting input to error amplifier Ch. 6 output of error amplifier Ch. 3 non-inverting input to error amplifier Ch. 3 inverting input to error amplifier Ch. 3 output of error amplifier Ch. 4 non-inverting input to error amplifier Pin No. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin symbol Description Ch. 4 inverting input to error amplifier Ch. 4 output of error amplifier Timing capacitor for timer latch delay Ground Ch. 3 & Ch. 4 timer latch selection (Low: disable) Ch. 6 ON/OFF function Ch. 5 ON/OFF function Ch. 2 ON/OFF function Ch. 3 & Ch. 4 ON/OFF function Ch. 1 ON/OFF function Power supply for output stage Bias for logic circuit of outputs Power ground Ch. 1 source electrode of output stage Ch. 1 output (for Pch-MOSFET) Ch. 4 output (for Pch-MOSFET) Ch. 3 output (for Pch-MOSFET) Ch. 2 source electrode of output stage Ch. 2 output (for Pch-MOSFET) Ch. 6 source electrode of output stage Ch. 6 output (for Nch-MOSFET) Ch. 5 output (for Pch-MOSFET) Ch. 5 source electrode of output stage Power ground VCC1 RT CT CS3 CS5 CS4 CS1 CS2 VREF CREF VREG IN2FB2 IN1FB1 IN5+ IN5FB5 IN6FB6 IN3+ IN3FB3 IN4+ IN4FB4 CP GND TLSEL CNT5 CNT4 CNT2 CNT3 CNT1 VCC2 VDRV PGND1 OUT1S OUT1 OUT4 OUT3 OUT2S OUT2 OUT6S OUT6 OUT5 OUT5S PGND2 s Absolute maximum ratings Item Power supply voltage Source peak current Sink peak current Input voltage for analog input Input voltage for logic input Total power dissipation * Junction temperature Ambient temperature Storage temperature Symbol Rating 20.0 –200 200 –0.3 to +2.5 –0.3 to Vcc +0.5 (Vcc ≤ 5.0V) –0.3 to +5.5 (Vcc > 5.0V) 550 125 –20 to +85 –40 to +150 Unit V mA mA V V mW °C °C °C VCC IOUT IOUT VANA VLOG Pd TJ TOP Tstg * Ta < 25°C s Recommended operating conditions Item Power supply voltage Input voltage for logic input Oscillation frequency Oscillator timing resistor Oscillator timing capacitor CREF terminal by-pass capacitor Vcc ≤ 5.0 Vcc > 5.0 Symbol Min. 2.5 0.0 0.0 50 6.8 22 0.01 Max. 18.0 Vcc +0.25 5.25 1000 100 1000 Unit V V kHz kΩ pF µF VCC VLOG fOSC RT CT CREF 124 FA3675F s Electrical characteristics (Ta=25°C, Vcc1=Vcc2=6V, CT=100pF, RT=10kΩ) Reference voltage section Item Output voltage Load regulation Line regulation Output voltage variation due to temperature change Symbol Test condition No load No load to RL=15kΩ Min. 0.99 Typ. 1.00 7 3 ± 0.5 Max. 1.01 15 10 ± 1.0 Unit V mV mV % VREF VRFLOD VRFLIN VRTa VCC=2.5 to 18V Ta=–20 to +85°C Regulated voltage section Item Output voltage Load regulation Line regulation Output voltage variation due to temperature change Symbol Test condition No load No load to RL=3.9kΩ Min. 2.134 Typ. 2.20 2 6 ± 0.5 Max. 2.266 10 20 ± 1.0 Unit V mV mV % VREG VRG LOD VRG LIN VRGTa VCC=2.5 to 18V Ta=–20 to +85°C Oscillator section Item Oscillation frequency Frequency variation due to supply voltage change Frequency variation due to temperature change Symbol Test condition Min. 432 Typ. 480 ±1 ±3 ±7 Max. 528 ±3 ±6 ± 14 Unit kHz % % fOSC fdV fdT RT=10k Ω, CT=100pF VCC=2.5 to 18V Ta=–20 to +25°C Ta=+25 to +85°C Error amplifier section Item Input offset voltage Input common mode voltage range Open-loop gain Unity-gain bandwidth Output sink current Output source current Symbol Test condition Min. Typ. 2 0.2 70 75 1.0 3.5 –0.18 –0.14.


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