DESCRIPTION
Time-extended luminance is achieved by driving the display with constant-cur- BLOCK DIAGRAM rent pulses, which will automatically compensate for the ageing-related capacitance loss by providing more elevated voltage pulses. CCO LSW DSW CCHG VCC 16 VCCO 15 GATE 13 VDC VDC-sen 11 3 CURRENT LIMITER OVER THERMAL PROTECTION VCC SENSE ERR. AMP. GATE DRIVER PWM COMP QS R + + EL1 10 CEL EL2 9 ICP ICN INTERNAL VOLTAGE SOURCE OVER VOLTAGE PROTECTION STAND-BY 1 TAB-GND 2 VSB ISET-N 4 ISET-D 5 RN RD 14 P-GND DIMMER CONTROL 6 VDM D98AU980 EL DRIVER CONTROL 7 CLKC CCLK f=8,4,2,1KHz 1/4 ~ 1/32 DIVIDER f=32KHz CLK OSC 8 CLKR RCLK November 2001 1/6 TDA7475A ABSOLUTE MAXIMUM RATINGS
Symbol VCC(DC) VCC(pk) VSB VDM VDC Vo(min) Topr Tstg Tj Parameter DC supply voltage Peak supply voltage Input voltage of VSB pin Input voltage of VDM pin Step up voltage Minimum Output Voltage (pin 9, 10) Operating temperature range Storage temperature range Junction temperature PIN CONNECTION Value 25 50 18 18 4...
STMicroelectronics
