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BD18378EFV-ME2 Folha de dados(PDF) 1 Page - Rohm |
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BD18378EFV-ME2 Folha de dados(HTML) 1 Page - Rohm |
1 / 30 page ○Product structure:Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays . 1/26 TSZ02201-0W1W0C500020-1-2 © 2015 ROHM Co., Ltd. All rights reserved. 04. Dec. 2015 Rev.004 TSZ22111・14・001 www.rohm.co m Advanced 12 Channel Constant Current LED Driver IC BD18378EFV-M General Description The BD18378EFV-M is a serial input controlled constant current LED driver with 8 V output rating. 6 bit current calibration is available for each output while a selected PWM input performs dimming on the corresponding output. The BD18378EFV-M is able to perform diagnostic (open / short / temperature) checks to detect LED failure and over temperature on chip. Fault detection is performed also during LED deactivated state. The settings of all internal registers can be read out to verify written information at any time. Features AEC-Q100 Qualified (Note1) Current capability: 50mA per output channel. 4-line SPI Control. External resistor current setting. Limp Home capability. PWM dimming 0.2-99.2% at 200Hz Diagnostic of all PWM inputs. Programmable output mapping to each PWM input. 6 Bit LED brightness adjustment on each channel. Diagnostic output on LED OPEN and SHORT for each channel during PWM on & off time. True LED voltage measurement. Over Temperature Protection and Thermal Feedback. Open Drain Fault indicator. Read-back of all register settings. Outputs can be connected in parallel to achieve more than 50mA into the load. Slew Rate limited switching reduces radiated Noise (EMI). Daisy chain compatible. (Note1: Operating Temperature Grade 2) Key Specifications Input voltage range: 3V to 5.5V Output voltage range: 0.5V to 8V Output Current range: 10mA to 50mA Output Current accuracy 3.5% Maximum clock frequency: 1.25MHz Operating current: 4mA (Typ.) Operating temperature range: - 40°C to +105°C Package L(Typ.) x W(Typ.) x H(Max.) HTSSOP-B28 9.70mm x 6.40mm x 1.00mm Applications Automotive illumination & ambient light Consumer electronics illumination Typical Application Circuit Diagram Figure 1. Typical application diagram to Controller BD18378EFV-M Heat Sink AGND IREF ERR VCC PGND VLED 8V max 5.5V max VCC CIN REXT CLED PWM 0 1 2 3 4 5 SDI CLK SDO LATCH CHANNEL 0 1 2 3 4 10 5 6 7 8 9 11 SENSE RP LEDs Quiet ground line Noisy ground line |
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Descrição semelhante - BD18378EFV-ME2 |
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