OB3370NCP – Cost Effective LED Controller

Part Number : OB3370N, OB3370NCP

Function : Cost Effective LED Controller

Manufactures : On-Bright

Images :

1 page
OB3370N image

2 page
pinout

Description :

OB3370N Cost Effective LED Controller GENERAL DESCRIPTION OB3370N is a high integrated and cost effective Light Emitting Diode (LED) driver optimized for LCD monitor and LCD TV backlight application. The OB3370N operates in voltage mode boost topology with fixed frequency to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 200mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. It offers both internal burst and external low frequency PWM (LPWM) dimming methods for a wide range of dimming control. OB3370N integrates under voltage lockout (VCC UVLO) and output over voltage protections that prevent the damage in the event of abnormal conditions. The output voltage level is monitored through OVP pin and it turns off the converter if an over voltage condition is present due to an open circuit condition. The OB3370N is available in SOP-8 Packages. Product Specification FEATURES „ Voltage Mode PWM Controller „ Flexible Dimming Mode Control: | Internal burst dimming control | External burst (LPWM) dimming control „ 0-2V DC voltage direct dimming control without external circuits „ Output Over Voltage Protections „ Under Voltage Lockout „ Soft Start APPLICATIONS „ LCD Monitor „ LCD TV „ Flat panel display TYPICAL APPLICATION Figure1. OB3370N Typical Application Schematic ©On-Bright Electronics Confidential -1- OB_DOC_DS_3370NA0 OB3370N Cost Effective LED Controller Absolute Maximum Ratings Parameter VDD Input Voltage to GND I/O to GND Operating Ambient Temp. TA Operating Junction Temp. TJ Min/Max Storage Temp. Tstg Lead Temp. (10 Sec) Value 7V -0.7V to VDD + 0.3V -20℃ ~ 85℃ 150℃ -55℃ ~150℃ 260℃ Note: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. Recommended Operating Range Parameter VDD Voltage Burst Dimming Frequency Value 4.5V to 5.5V 100Hz to 1KHz Package Thermal Characteristics Parameter Thermal Resistance θJA (SOP) Value 85℃/W Ordering Information Part Number OB3370NCP OB3370NCPA Description SOP8, pb-free in tube SOP8, pb-free in T&R Package Marking Information ©On-Bright Electronics Confidential -2- OB_DOC_DS_3370NA0 Pin Configuration OB3370N Cost Effective LED Controller 1 DIM 2 OVP 3 FB 4 VDD BF/DMOD 8 CMP 7 GND 6 GATE 5 Terminal Assignment Number Pin Name 1 DIM 2 OVP 3 FB 4 VDD 5 GATE 6 GND 7 CMP 8 BF/DMOD I/O Pin Function Input Dimming signal input. Digital PWM signal input for external PWM dimming mode or 0V-2V DC voltage input to adjust duty cycle for internal b […]

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image

OB3370NCP Datasheet

Function : Cost Effective LED Controller

Manufactures : On-Bright

Images :

1 page
OB3370N image

2 page
pinout

Description :

OB3370N Cost Effective LED Controller GENERAL DESCRIPTION OB3370N is a high integrated and cost effective Light Emitting Diode (LED) driver optimized for LCD monitor and LCD TV backlight application. The OB3370N operates in voltage mode boost topology with fixed frequency to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 200mV, the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. It offers both internal burst and external low frequency PWM (LPWM) dimming methods for a wide range of dimming control. OB3370N integrates under voltage lockout (VCC UVLO) and output over voltage protections that prevent the damage in the event of abnormal conditions. The output voltage level is monitored through OVP pin and it turns off the converter if an over voltage condition is present due to an open circuit condition. The OB3370N is available in SOP-8 Packages. Product Specification FEATURES „ Voltage Mode PWM Controller „ Flexible Dimming Mode Control: | Internal burst dimming control | External burst (LPWM) dimming control „ 0-2V DC voltage direct dimming control without external circuits „ Output Over Voltage Protections „ Under Voltage Lockout „ Soft Start APPLICATIONS „ LCD Monitor „ LCD TV „ Flat panel display TYPICAL APPLICATION Figure1. OB3370N Typical Application Schematic ©On-Bright Electronics Confidential -1- OB_DOC_DS_3370NA0 OB3370N Cost Effective LED Controller Absolute Maximum Ratings Parameter VDD Input Voltage to GND I/O to GND Operating Ambient Temp. TA Operating Junction Temp. TJ Min/Max Storage Temp. Tstg Lead Temp. (10 Sec) Value 7V -0.7V to VDD + 0.3V -20℃ ~ 85℃ 150℃ -55℃ ~150℃ 260℃ Note: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. Recommended Operating Range Parameter VDD Voltage Burst Dimming Frequency Value 4.5V to 5.5V 100Hz to 1KHz Package Thermal Characteristics Parameter Thermal Resistance θJA (SOP) Value 85℃/W Ordering Information Part Number OB3370NCP OB3370NCPA Description SOP8, pb-free in tube SOP8, pb-free in T&R Package Marking Information ©On-Bright Electronics Confidential -2- OB_DOC_DS_3370NA0 Pin Configuration OB3370N Cost Effective LED Controller 1 DIM 2 OVP 3 FB 4 VDD BF/DMOD 8 CMP 7 GND 6 GATE 5 Terminal Assignment Number Pin Name 1 DIM 2 OVP 3 FB 4 VDD 5 GATE 6 GND 7 CMP 8 BF/DMOD I/O Pin Function Input Dimming signal input. Digital PWM signal input for external PWM dimming mode or 0V-2V DC voltage input to adjust duty cycle for internal b […]

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OB3370NCP Datasheet


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