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LD1071 Scheda tecnica(PDF) 3 Page - LDT Co., Ltd |
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LD1071 Scheda tecnica(HTML) 3 Page - LDT Co., Ltd |
3 / 36 page Ver1.0 3 LD1071 16 Channel Output LED Driver with 14 bit PWM Controller The LD1071 is specifically designed for LED and LED display applications using PWM(Pulse Width Modulation) control with 14 bit color depth. The LD1071 provides a constant output current for driving the LEDs against for the variation of LED forward voltage( Vf ). The constant output current can be preset through an external resistor. Moreover, the preset output current with external resistor can be programmed up to 256 levels for LED global brightness adjustment. The LD1071 consists of 16 bit shift registers, latches, and-gates, constant current driver and 14 bit PWM controller. FEATURES • Output current : set-up at 5mA to 45mA with an external resistor ( when VDD=3.3V, Iout : 5mA ~ 30mA ) • Include error detection circuit • 16 constant current output channels • 14 bit gray scale PWM control • 8 bit programmable output current control • Constant current accuracy - Pin to pin deviation : < ±3% (Max) - Chip to chip deviation : < ±6% ( Max) • 3.3V / 5V CMOS compatible input • Package : LD1071-SP (SOP-24), LD1071-SS (SSOP-24) • Maximum CLOCK input frequency : 25MHz • Maximum PWMCK input frequency : 25MHz DESCRIPTION PIN DESCRIPTION PIN NO. PIN NAME DESCRIPTION 1 GND Ground signal 2 DIN Serial input data 3 CLOCK Shift input clock for serial input data DIN( Rising Edge Clocking) 4 STROBE Data strobe signal. This pin is a pull-down type. 24 VDD Power supply signal (3.3V/5V) 21 PWMCK PWM gray scale clock signal. This pin is a pull-up type. 22 DOUT Serial data output 23 REXT Connect the resistor between this pin and GND to set up the constant output current for all the OUTn. 5~12 13~20 OUTn Constant current outputs, n = 0 ~ 15 PIN CONFIGURATION 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 GND DIN CLOCK STROBE OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 VDD REXT DOUT PWMCK OUT15 OUT14 OUT13 OUT12 OUT11 OUT10 OUT9 OUT8 |
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