BD93941EFV Datasheet, PDF (1/30 Pages) Rohm – LED pin rating 60V

Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
Panels (DCDC Converter type)
BD93941EFV BD93941FP
General Description
BD93941EFV and BD93941FP is a high efficiency driver
for white LEDs and designed for large LCDs. These ICs
are built-in a boost DCDC converters that employ an
array of LEDs as the light source. BD93941EFV and
BD93941FP have some protect function against fault
conditions, such as the over-voltage protection (OVP),
the over current limit protection of DCDC (OCP), the
short circuit protection (SCP), the open detection of LED
string. Therefore BD93941EFV and BD93941FP are
available for the fail-safe design over a wide range
output voltage.
Key Specification
 Operating power supply voltage range: 9.0V to 35.0V
 LED minimum current
30mA
 LED maximum current:
200mA
 Oscillator frequency:
150kHz (RT=100kΩ)
 Operating Current:
4.5mA (Typ.)
 Operating temperature range:
-40°C to +85°C
Applications
TV, Computer Display, Notebook, LCD Backlighting
Features
 4ch LED constant current driver and DC/DC converter
 Maximum LED Current: 200mA
 LED Feedback Voltage: 0.37V (@ADIM=2.5V)
so lower heat. Adjustable Feed Back Voltage
by following LED Current setting.
 2% LED current accuracy (ADIM=2.5V,
when each LED is set to 100mA)
 Analog current (Linear) dimming at ADIM pin
 LED pin rating 60V
 Individual detection and individual LED OFF for both
open and short circuits
 Built-in ISET pin short-circuit protection circuit
 Set Soft-Start time by external capacitor.
 FET’s Gate (N pin) is driven by 5.8V swing
 Built-in Vout discharge circuit for shutdown
 Built-in Vout overvoltage protection (OVP) /
reduced voltage protection (SCP) circuit
 HTSSOP-B20 and HSOP20 package with high heat
radiation efficiency
Package
HTSSOP-B20
HSOP20
W(Typ.) x D(Typ.) x H(Max.)
6.50mm x 6.40mm x 1.00mm
14.90mm x 7.80mm x 2.10mm
Typical Application Circuit
VIN
VIN
Inductor
Diode
Figure 1(a). HTSSOP-B20
(BD93941EFV)
Figure 1(b). HSOP20
(BD93941FP)
CIN
FET
PGND
AGND
COUT
REG58
CREG
RN2
RCS
DN RN1
RRT
ROVP1
ROVP2
COVP
RFB CFB1
CFB2
CSS
RISET
CAUTO
ADIM
EXPOSED
PAD
REG58
N
DCDC_GND
CS
RT
OVP
FB
SS
ISET
AUTO
ADIM
STB
VCC
LED4
LED3
LED_GND
LED2
LED1
PWM
AGND
ON/OFF
RVCC
CVCC
CLED4
CLED3
CLED2
CLED1
PWM
Figure 2. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit ○This product has not designed protection against radioactive rays
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TSZ02201-0F1F0C100270-1-2
10.Oct.2013 Rev.001