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BD83732HFP-M Datasheet(PDF) 7 Page - Rohm |
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BD83732HFP-M Datasheet(HTML) 7 Page - Rohm |
7 / 33 page 7/29 BD83732HFP-M / BD83733HFP-M TSZ02201-0G1G0C700310-1-2 © 2014 ROHM Co., Ltd. All rights reserved. 2016.Aug.25 Rev.003 www.rohm.com TSZ22111・15・001 [A] R V R ) V (V I VIN_F IN_F_REF VIN_F IN_F IN OUT Functional Description (Unless otherwise specified, Ta=25°C, VIN=13V, IOUT=6V and RVIN_F =0.47Ω. Numbers are "Typical" values.) 1. Output Current Setting LED Current IOUT can be set by value of resistor RVIN_F. where: VIN_F_REF is 0.18V (Typ) Figure 13. Output Current Setting 2. Table of Operations The PWM dimming mode switches to linear control depending on CRT terminal voltage. When VCRT > VCRT_DIS2( Typ ~ 4.0V ), Dimming mode turns to Linear Control, and discharge resistance of DISC terminal changes from RD1( Typ ~ 50 Ω ) to RD2 ( Typ ~ 5k Ω ). When an LED open/short-circuit fault is detected, which depends on IOUT terminal voltage, the output current is turned OFF. Output current is also turned OFF when PBUS terminal is pulled LOW. Operation Mode CRT Terminal IOUT Terminal Voltage (VIOUT) Output Current (IOUT) PBUS Terminal Linear Control 4.0V(Typ)≤VCRT - 50mA~500mA Hi-Z PWM dimming See Features Functional Description, 3. PWM Dimming Operation - See Features Functional Description, 3. PWM Dimming Operation Hi-Z LED Current De-rating - - See Features Description, 8. LED Current De-rating Function PBUS<2.5V LED Open - VIOUT ≥ VIN - .050V(Typ) 1μA(Max) Low Output LED Short - VIOUT ≤ 0.6V(Typ) 40 μA(Max) Low Output PBUS Control OFF - - 1μA(Max) Low Input +B PWM_in VREF IOUT VIN VIN-0.180V (Typ) GND VIN_F RVIN_F IOUT CIOUT |
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