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| HT2050 Five LAMP/LED Flash Driver www..com Features * * * * * C-MOS Metal-Gate Process Operating voltage: 1.2V~4.5V Low stand-by current: 1A at 3V A five lamp flash driver Random or sequence flash * * * * On/Off toggle control 1/10 duty cycle output A built-in oscillator Minimum external components General Description The HT2050 is a low cost, low-power CMOS fabricated LSI chip designed for lamp and LED flash drivers. It contains five flash outputs. Each flash output is with a 10mA capability that can implement random or sequential flashing controlled by a single option pin. The chip requires only one external resistor for normal applications. It is very suitable for use in products that require flashing lights, such as gift cards, Christmas decoration, etc. Pin Assignment Block Diagram Pad Coordinates Pad No. 1 2 3 4 5 6 Unit: mil X -21.09 -9.89 1.31 12.51 23.71 26.23 Y -20.9 -20.9 -20.9 -20.9 -20.9 13.3 Pad No. 7 8 9 10 11 12 X 26.55 13.35 6.15 -10.89 -26.25 -26.25 Y 26.5 26.5 26.5 26.5 26.5 10.98 Chip size: 64 x 59 (mil)2 * The IC substrate should be connected to VDD in the PCB layout artwork. 1 26th Mar '97 HT2050 Pad Description Pad No. www..com Pad Name OUT1 OUT2 OUT3 OUT4 OUT5 OSC1 OSC2 VDD TEST OPTION ON/OFF VSS I/O O O O O O I O I Description Lamp/LED flash drive output Lamp/LED flash drive output Lamp/LED flash drive output Lamp/LED flash drive output Lamp/LED flash drive output Oscillator input Oscillator output Positive power supply 1 2 3 4 5 6 7 8 9 I/O For IC test only I I I Random or sequence function selection Toggle ON/OFF control Negative power supply, GND 10 11 12 Note: OPTION=VDD Sequential Mode OPTION=Open Random Mode Absolute Maximum Ratings Supply Voltage ................................. -0.3V to 5V Input/Output Voltage ... VSS-0.3V to VDD+0.3V Storage Temperature................. -50C to 125C Operating Temperature................... 0C to 70C Electrical Characteristics Symbol VDD ISTB IDD IOL FOSC Parameter VDD Operating Voltage Stand-by Current Operating Current Output Sink Current Oscillator Frequency -- 3V 3V 1.5V 3V -- Test Condition Condition -- -- No load VOL=0.5V VOL=0.5V R=150K~300K Min. 1.2 -- -- 5 10 -- Typ. 3 1 200 8 15 64K Max. 4.5 2 500 -- -- -- Unit V A A mA mA Hz 2 26th Mar '97 HT2050 Application Circuit www..com 3 26th Mar '97 |
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