BD7844AEFV Datasheet, PDF (1/14 Pages) Rohm – LED Driver for Indicators and Signage

LED Drivers for LED Decoration
LED Driver
for Indicators and Signage
BD7844AEFV
No.11107EAT01
●Description
BD7844AEFV is LED Display Driver. It can control 16ch Nch Open Drain output for LED drive. It can control the luminance of
the LEDs by the setting of the internal register, with 256 steps PWM control. It supports I²C interface. HTSSOP-B28 (with
Back-side metal for heat radiation) package.
●Features
1) 16ch × 80mA (Absolute Maximum Rating)
2) Conforming to I²C -bus I/F (1MHz Fast mode Plus)
3) Either of interactive or single direction can be selected with the I2CSEL pin. (2MHz clock frequency on single direction)
4) Independent setting of output brightness is possible by register setting for each channel. (PWM 256 steps)
5) Power supply voltage : 4.5 ～ 5.5V
6) Max voltage of Open-drain output terminals: 20.0V (Absolute Maximum Rating)
7) Built-in thermal shutdown (TSD）circuit
8) Built-in power-on reset circuit
9) Small package with back-side metal for heat radiation: HTSSOP-B28
●Absolute Maximum Ratings (Ta=25℃)
Parameter
Symbol
Ratings
Power supply voltage
VDDMAX1
-0.3 ～ 7.0
Operating voltage range
Output terminal voltage
Output terminal current
Logic input terminal voltage
Permissible dissipation
Operating temperature range
Storage temperature range
VDDMAX2
VOUTMAX
IOUTMAX
VINMAX
Pd
Topr
Tstr
4.5 ～ 5.5
-0.3 ～ 20.0
80 ^*1
-0.3 ～ VDD+0.3 ≦ 7.0
1.45 ^*2
-40 ～ 85
-55 ～ 150
Junction temperature
Tjmax
150
Please be careful that the anti-radiation design is not applied to this IC.
*1) Please take the IC’s power consumption & permissible dissipation into consideration before using it.
*2) Mounted on ROHM standard board (70mm×70mm×1.6mm (thickness), glass-epoxy board).
Ta=25℃ or more, it is reduced with 11.6ｍW/℃.
Unit
V
V
V
mA/ch
V
W
℃
℃
℃
●Operating conditions (Ta=-40~85℃)
Parameter
Symbol
Ratings
Unit
Conditions
Power supply voltage
High level input voltage
Low level input voltage
Low level output current
VDD
VIH
VIL
IOL
4.5 ～ 5.5
VDDx0.7 ～ VDD
0 ～ VDDx0.3
～ 30
V
V _{SDA,SCL,RESETB,}
V ^{I2CSEL,A0,A1,A2,A3}
mA SDA
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2011.07 - Rev.A