FA7616CPV

FA7616CP FUJI | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 5

Technical content

FA7616CP(E)(V) n Description The FA7616CP(E)(V) is a bipolar control IC having two channels of PWM-type switching regulator control circuits. With this IC, a DC-to-DC converter can be easily implemented for a minimum input voltage of 1.4V. n Features

• Input voltage from 1.4V (VCC = 1.4 to 12V)
• Open-collector output
• Wide operating frequency range (f OSC : 10 to 500kHz)
• Output ON/OFF control function
• Not many external discrete components are needed n Applications
• Battery power supply (two, 1.5V batteries) for portable equipment n Dimensions, mm \ TSSOP-16 1 8 916 0.6 0~10˚0.65 6.4–0.2 4.4–0.1 5.0–0.1 0.1–0.1 0.15 +0.05 –0.06 0.24 +0.08 –0.07 1.2max \ SSOP-16 1 8 916 0.6 0~10˚0.65 7.9–0.3 5.3 6.2 0.1–0.1 0.2 +0.1 –0.05 0.3 2.1max \` DIP-16 16 9 819.4 6.5 7.6 3.4 4.3max 1.50.81 3.1min 0.2min 0.3 +0.1 –0.05 n Block diagram FA7616CP(E)(V) Bipolar IC For Switching Power Supply Control Pin Pin Description No. symbol

1 VCC2 IC main power supply

2 CT Oscillator timing capacitor

3 IN2 (+) Non-inverting input to error

4 IN2 (–) Inverting input to error amplifier

5 FB2 Error amplifier output

6 DT2 Dead time adjustment

7 OUT2 CH. 2 Output

8 GND Ground

9 OUT1 CH. 1 Output

10 DT1 Dead time adjustment

11 FB1 Error amplifier output

12 IN1 (–) Inverting input to error amplifier

13 CST Start-up circuit timing capacitor

14 VCC1 Start-up circuit power supply

15 ON/OFF Output ON/OFF control

16 REF Reference voltage output (1.20V)

FA7616CP(E)(V) n Electrical characteristics (Ta = 25°C, V CC1 = 1.6V, VCC2 = 3V, V15 = 2V, CT = 1000pF, RT = 10kW ) Reference voltage section Item Symbol Test condition Min. Typ. Max. Unit Output voltage VREF IOR = 0.1mA 1.196 1.220 1.244 V Line regulation LINE V CC = 2.5 to 12V, V15 = 2V fixed 18m V Load regulation LOAD IOR = 0.1 to 1mA 1 8 mV Output voltage variation due to temperature change VTC1 Ta = –20 to +25°C –2 –0.3 1 % IOR = 0.1mA VTC2 Ta = +25 to +85°C –2 –0.6 1 % IOR = 0.1mA Oscillator section Item Symbol Test condition Min. Typ. Max. Unit Oscillation frequency fOSC C T = 1000pF, R T = 10kW 80 92 110 kHz Frequency variation 1 (due to supply voltage change)fdV VCC = 2.5 to 12V 1 3 % Frequency variation 2 (due to temperature change) fdT Ta = –20 to +85°C2 % Error amplifier section Item Symbol Test condition Min. Typ. Max. Unit Input offset voltage VIO 21 0 m V Input bias current IB 1 mA Common-mode input voltage VCM 0 VCC2 – 1.7V Open-loop voltage gain AV 70 dB Unity-gain bandwidth G B 1.0 MHz Maximum output voltage VOM+ R NF = 100kW VCC2 –0.5 V VOM– R NF = 100kW 200 mV Output source current IOM+ VOM = 1V 40 85 170 mA PWM comparator section Item Symbol Test condition Min. Typ. Max. Unit Input threshold voltage VTH0 Duty cycle = 0% 0.80 V Input threshold voltage VTH100 Duty cycle = 100% 1.45 V n Absolute maximum ratings Item Symbol Rating Unit Supply voltage VCC 12 V Reference voltage output currentIOR 5m A Output sink current IO 10 mA Total power dissipationPd 300 mW Operating temperature Topr –20 to +85 °C Storage temperature Tstg –40 to +150 °C n Recommended operating conditions Item Symbol Min. Max. Unit Supply voltage 1 VCC1 1.4 12 V Supply voltage 2 VCC2 2.5 12 V Output sink current (at start-up)ISINK 3m A Output sink current ISINK 5m A (at steady state) Oscillation frequency fOSC 10 500 kHz Oscillator timing capacitorC ST 47 10,000 pF (start-up circuit) Oscillator timing capacitorC T 220 10,000 pF Oscillator timing resistanceR T 4.7 47 k W Feedback resistance R NF 100 k W

FA7616CP(E)(V) Dead time adjustment circuit section Item Symbol Test condition Min. Typ. Max. Unit Input threshold voltage VTH DT0 Duty cycle = 0% 0.08 0.15 V Input threshold voltage VTH DT100 Duty cycle = 100% 0.80 0.95 V Output ON/OFF circuit section Item Symbol Test condition Min. Typ. Max. Unit ON/OFF threshold voltage VTH ON 0.5 0.9 1.2 V Input current II ON Pin 15 = 2V 650 850 mA Start-up circuit section Item Symbol Test condition Min. Typ. Max. Unit Oscillation frequency fSC C ST = 1000pF, VCC2 = 0.5V 70 95 115 kHz ON duty cycle D ST C ST = 1000pF, VCC2 = 0.5V 40 50 60 % Threshold voltage to stop VCC2 TH ON-to-OFF threshold voltage 2.15 2.30 2.45 V at start-up circuit Output section Item Symbol Test condition Min. Typ. Max. Unit Output leakage current ILEAK VO = 12V 5 mA L-level output voltage VOL Output sink current =5mA 0.25 0.55 V Overall device Item Symbol Test condition Min. Typ. Max. Unit Standby current 1 ICC ST1 Pin 15 = 0V or VCC2 > 2.45V 0.1 10 mA Standby current ICC STAR Pin 15 = 2V, VCC2 < 2.15V 400 800 mA Standby current 2 ICC ST2 Pin 15 = 0V, VCC2 = 3V 0.4 0.7 mA Operating-state supply current ICC AV Pin 15 = 2V, VCC2 = 3V 2.2 3.2 mA n Characteristic curves (Ta = 25°C) Oscillation frequency (fOSC ) vs. Oscillation frequency (fOSC ) vs. timing capacitor capacitance (CT) timing capacitor capacitance (CST ) and output duty cycle At steady state At strat-up state

FA7616CP(E)(V) Output duty cycle vs. DT terminal voltage (VDT ) Output duty cycle vs. FB terminal voltage (V FB ) L-level output voltage (VO1L ) vs. CH. 1 output sink current L-level output voltage (VOL ) vs. output sink current (ISINK1 )( I SINK) At start-up state At steady state Supply current (ICC ) vs. supply voltage (VCC ) Error amplifier frequency (f) vs. voltage gain (A V) VOL [V]

FA7616CP(E)(V) n Application circuit \` Flyback-transformer type and chopper type boost 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 0.01mF to 0.1mF, between VCC and REF terminals in order to prevent from irregular output pulse at start-up.