LED DRIVER FOR LCD BACKLIGHS
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
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
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
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
