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FAN7316MX Datasheet(PDF) 4 Page - Fairchild Semiconductor |
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FAN7316MX Datasheet(HTML) 4 Page - Fairchild Semiconductor |
4 / 21 page © 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7316 • 1.0.1 4 Pin Definitions Pin # Name Description 1 OLP1 2 OLP2 This pin is for open-lamp protection. If OLP is lower than 1.5V at initial operation, the IC operates at striking mode for BCT 450 cycles. If OLP is lower than 1.5V in normal mode, the IC is shut down after a delay of three BCT cycles. 3 CMP Error amplifier output. A compensation capacitor should be connected between this pin and ground. 4 FB Error amplifier inverting input. This pin voltage is regulated at 2V or ADIM voltage. 5 BDIM This pin is for burst dimming input. The voltage range of 0.5 to 2V at this pin controls burst mode duty cycle from 0% to 100%. 6 ADIM This pin is for positive analog dimming input. This voltage to 2V at this pin controls the amplitude of the lamp current. 7 ENA This pin is for turning on/off the IC. 8 GND Ground. 9 OUTL Low-side driver output. The output stage can deliver about 500mA source and sink current, typically. 10 VREF 6V reference voltage. 11 VIN IC supply voltage. 12 VB High-side floating supply. The bootstrap capacitor should be connected between this pin and VS pin, which can be fed by an internal bootstrap MOSFET. 13 OUTH High-side driver output. The output stage can deliver about 500mA source and sink current, typically. 14 VS High-side floating supply return. Layout care should be taken to avoid below-ground spikes on this pin. 15 SCP This pin is for short-circuit protection. If SCP is higher than 2V, IC enters shutdown mode after a delay of 32 BCT cycles. 16 RT This pin programs the switching frequency. The resistor should be connected between this pin and ground. 17 BCT/FT This pin programs the burst dimming frequency. A capacitor should be connected between this pin and ground. The waveform of this pin is the triangular waveform whose amplitude is from 0.5V to 2V. This pin voltage goes up to 4V when the IC enters shutdown mode. 18 OLR This pin is for open-lamp regulation. If the voltage at OLR reaches 2V, the IC makes this pin voltage be controlled not to exceed 2V. If OLR voltage is higher than 1.75V, the IC enters shutdown mode after delays of 451 BCT cycles in striking mode and three BCT cycles in normal mode, respectively. If this pin voltage is higher than 3V, the IC enters shutdown mode without delay. 19 OLP4 20 OLP3 This pin is for open lamp protection. If OLP is lower than 1.5V at initial operation, the IC operates at striking mode for BCT 450 cycles. If OLP is lower than 1.5V in normal mode, the IC is shut down after a delay of three BCT cycles. |
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