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ML4831 Datasheet(PDF) 2 Page - Micro Linear Corporation |
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ML4831 Datasheet(HTML) 2 Page - Micro Linear Corporation |
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2 / 14 page  ML4831 2 PIN CONFIGURATION PIN# NAME FUNCTION PIN# NAME FUNCTION 1 EA OUT PFC Error Amplifier output and compensation node 2 IA OUT Output and compensation node of the PFC average current transconductance amplifier. 3 I(SINE) PFC gain modulator input. 4 IA+ Non-inverting input of the PFC average current transconductance amplifier and peak current sense point of the PFC cycle by cycle current limit comparator. 5 LAMP F.B. Inverting input of an Error Amplifier used to sense (and regulate) lamp arc current. Also the input node for dimming control. 6 LFB OUT Output from the Lamp Current Error Transconductance Amplifier used for lamp current loop compensation 7 R(SET) External resistor which sets oscillator FMAX, and R(X)/C(X) charging current PIN DESCRIPTION 8 R(T)C(T) Oscillator timing components 9 INTERRUPT Input used for lamp-out detection and restart. A voltage greater than 7.5 volts resets the chip and causes a restart after a programmable interval. 10 R(X)/C(X) Sets the timing for the preheat, dimming lockout, and interrupt 11 GND Ground 12 P GND Power ground for the IC 13 OUT B Ballast MOSFET drive output 14 OUT A Ballast MOSFET drive output 15 PFC OUT Power Factor MOSFET drive output 16 VCC Positive Supply for the IC 17 VREF Buffered output for the 7.5V voltage reference 18 EA–/OVP Inverting input to PFC error amplifier and OVP comparator input ML4831 18-Pin DIP (P18) EA OUT IA OUT I(SINE) IA+ LAMP F.B. LFB OUT R(SET) R(T)/C(T) INTERRUPT EA–/OVP VREF VCC PFC OUT OUT A OUT B P GND GND R(X)/C(X) 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 TOP VIEW |
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