NJW4617DL3-TE1 Nisshinbo

NJW4617 Constant Current LED Driver with PWM Dimming Control GENERAL DESCRIPTION PACKAGE OUTLINE The NJW4617 is a constant current LED driver with PWM dimming control. The output current can be set by external sensing resister, and the NJW4617 can set up to 500mA. Because the withstand voltage of the output (LED) pin is 40V, it can series-connect the LED depending on forward voltage of the NJW4617DL3 LED. The LED dimming control can be regulated via PWM duty (TO-252-5) cycle. It is suitable for back light, light source and so on. FEATURES Operating Voltage Range: 2.5V to 40V Output Voltage: V =40V max. LED Output Current: I =20mA to 500mA LED Output Current Accuracy: 1.5% To 11 of White LED can be operated. (at LED Vf=3.4V) Quiescent Current: 450A max. PWM Dimming Control and Enable Control (Common Pin) Over Current Protection Thermal Shutdown Protection LED Short Protection Package: TO-252-5 BLOCK DIAGRAM V DD LED + V REF (0.2V) R S Current Limit Control Thermal Shut Down Logic LED Short Protection Standby Timer GND EN/PWM Ver.2020-06-11 - 1 - NJW4617 PIN CONFIGURATION 5. LED 4. R S 3. GND 2. EN/PWM 1. V DD PIN DESCRIPTIONS Pin No. Pin Name I/O Function 1 V - Power supply pin DD Standby control pin and PWM signal input pin for dimming control. At Standby control Normal operation: High Level. Standby mode: Low Level. 2 EN/PWM I At PWM signal input The LED dimming control can be regulated by PWM duty cycle. In the case without dimming, I becomes the current set by the external resistor LED (Rs) when High level is input to this pin. Note that this pin should not be open. 3 GND - Ground pin Resistor connect pin of I setting. LED 4 R O The LED current can be set with connected resistor (R ) between R pin and GND S S S pin. R = 0.2 V / I A S LED Constant current circuit output pin 5 LED O Connect cathode pin of LED. Ver.2020-06-11 - 2 -