LED Driver. BD81A74EFV-M Datasheet

BD81A74EFV-M Driver. Datasheet pdf. Equivalent

Part BD81A74EFV-M
Description 4ch White LED Driver
Feature Datasheet 4ch White LED Driver Built-in Current Driver Buck-Boost and Boost DC/DC Converter for Aut.
Manufacture ROHM
Datasheet
Download BD81A74EFV-M Datasheet



BD81A74EFV-M
Datasheet
4ch White LED Driver Built-in Current Driver
Buck-Boost and Boost DC/DC Converter
for Automotive
BD81A74EFV-M BD81A74MUV-M
General Description
Key Specifications
BD81A74EFV-M / BD81A74MUV-M is a white LED
driver with the capability of withstanding high input
voltage (maximum 35 V). This driver has 4ch constant-
current drivers in 1-chip, where each channel can draw
up to 120 mA (Max), and it is suitable for high
illumination LED drive. Furthermore, a buck-boost
current mode DC/DC converter is also built to achieve
Operating Input Voltage Range
4.5 V to 35 V
Output LED Current Accuracy
±3.0 %@50 mA
DC/DC Oscillation Frequency 200 kHz to 2200 kHz
Operating Temperature
-40 °C to +125 °C
LED Maximum Output Current
120 mA/ch
LED Maximum Dimming Ratio 10,000:1@100 Hz
PWM Minimum Pulse Width
1.0 µs
stable operation during power voltage fluctuation.
Light modulation (10,000:1@100 Hz dimming Packages
W (Typ) x D (Typ) x H (Max)
function) is possible by PWM input.
VQFN28SV5050
5.0 mm x 5.0 mm x 1.0 mm
Features
HTSSOP-B28
9.7 mm x 6.4 mm x 1.0 mm
AEC-Q100 Qualified*1
4ch Current Driver for LED Drive
Buck-Boost Current Mode DC/DC Converter
Control DC/DC Converter Oscillation Frequency by
External Synchronized Signal
Spread Spectrum Function
LSI Protection Function (UVLO, OVP, TSD, OCP, SCP)
LED Abnormality Detection Function (Open/Short)
VOUT Discharge Function (Buck-Boost Structure
VQFN28SV5050
HTSSOP-B28
Limitation)
BD81A74MUV-M
BD81A74EFV-M
*1 Grade 1
Applications
Automotive CID (Center Information Display) Panel
Car Navigation
Cluster Panel
HUD (Head Up Display)
Small and Medium Type LCD Panels for Automotive
Use
Typical Application Circuit
Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays
This product is protected by U.S. Patent No.7,235,954, No.7,541,785, No.7,944,189.
www.rohm.com
©2017 ROHM Co., Ltd. All rights reserved.
TSZ22111 14 001
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TSZ02201-0T2T0C600300-1-2
10.Apr.2020 Rev.005



BD81A74EFV-M
BD81A74EFV-M BD81A74MUV-M
Pin Configuration
VQFN28SV5050 (TOP VIEW)
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
-
Pin Name
LEDEN1
LEDEN2
LED1
LED2
LED3
LED4
OVP
ISET
PGND
OUTL
DGND
VDISC
SW
OUTH
BOOT
VREG
EN
CS
VCC
SS
COMP
RT
SYNC
SSCG
GND
PWM
FAIL1
FAIL2
EXP-PAD
Function
Enable pin 1 for LED output
Enable pin 2 for LED output
LED output pin 1
LED output pin 2
LED output pin 3
LED output pin 4
Over voltage detection pin
LED output current setting pin
LED output GND pin
Low side FET gate pin
DC/DC converter output GND pin
Output voltage discharge pin
High side FET source pin
High side FET gate pin
High side FET driver power supply pin
Internal constant voltage
Enable pin
DC/DC converter current sense pin
Input power supply pin
Soft Startcapacitor connection
Error Amp output
Oscillation frequency setting resistor connect
External synchronization input pin
Spread spectrum setting capacitor pin
Small signal GND pin
PWM light modulation signal input pin
Failuresignal output pin 1
Failuresignal output pin 2
Back side thermal PAD (Connect to GND)
www.rohm.com
© 2017 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
2/41
TSZ02201-0T2T0C600300-1-2
10.Apr.2020 Rev.005





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