MB3789

www.DataSheet4U.com FUJITSU SEMICONDUCTOR DATA SHEET DS04-27211-3E ASSP For Power Supply Applications BIPOLAR Switching Regulator Controller (Supporting External Synchronization) MB3789 s DESCRIPTION The MB3789 is a PWM (pulse width modulation) switching regulator controller supporting an external sync signal. The MB3789 incorporates two error amplifiers which can be used respectively for voltage control and current control, allowing the IC to serve as a DC/DC converter with current regulating functions. The MB3789 is the ideal IC for supplying power to the back-lighting fluorescent tube for a liquid crystal display (LCD) device such as a camera-integrated VTR. DataShee s FEATURES DataSheet4U.com Wide range of operating power supply voltages: 3 V to 18 V Low current consumption: 1.5 mA (Typ.) Wide input voltage range of error amplifier: –0.2 V to VCC – 1.8 V Built-in two error amplifier Oscillator capable of operating with an external sync signal Built-in timer latch short protection circuit Variable dead time provides control over total operating range Output supporting a power MOSFET 16-pin SSOP package mountable at high density s PACKAGE 16-pin Plastic SSOP DataSheet4U.com (FPT-16P-M05) DataSheet 4 U .com www.DataSheet4U.com MB3789 s PIN ASSIGNMENT (TOP VIEW) VCC1 1 16 GND VREF 2 15 OUT CT 3 14 VCC2 SYNC 4 13 CB SCP *1 5 12 DTC FB2 *2 FB1 6 11 et4U.com −IN1 *1 +IN1 *1 7 10 −IN2 *2 +IN2 *2 DataShee 8 DataSheet4...