NCR421UX Nexperia

NCR420U / NCR421U 150 mA LED driver in SOT457 Rev. 1 10 December 2018 Product data sheet 1. Product profile 1.1. General description LED driver consisting of resistor-equipped NPN transistor with two diodes on one chip in an SOT457 (SC-74 TSOP6) plastic package. Table 1. Product overview Type number Package Nexperia JEITA NCR420U SOT457 SC-74 TSOP6 NCR421U SOT457 SC-74 TSOP6 1.2. Features and benefits Stabilized output current of 10 mA without external resistor Stabilized output current adjustable up to 150 mA when an external resistor is used High current accuracy at supply voltage variation Low voltage overhead of 1.4 V Reduces component count and board space High power dissipation of 750 mW Supply voltage up to 40 V Digital PWM input up to 10 kHz frequency for NCR421U AEC-Q101 qualified 1.3. Applications Constant current LED driver Generic constant current source Automotive applications (for example: interior lighting, dash board, instrumentation, number plate light) Increase stabilized output current by paralleling driversNexperia NCR420U / NCR421U 150 mA LED driver in SOT457 1.4. Quick reference data Table 2. Quick reference data Symbol Parameter Conditions Min Typ Max Unit V enable voltage EN NCR420U - - 40 V NCR421U - - 4.5 V V output voltage - - 40 V out I stabilized output current out NCR420U V = 1.4 V 1 9 10 11 mA out V = 24 V EN NCR421U V = 1.4 V 1 9 10 11 mA out V = 3.3 V EN 1 Pulse test: t 300 s 0.02 p 2. Pinning information Table 3. Pinning Pin Symbol Description Simplified outline Symbol 6 5 4 REXT IOUT GND 1 VEN enable voltage 2 IOUT output current 3 IOUT output current 1 2 3 4 GND ground SC-74 TSOP6 5 IOUT output current (SOT457) VEN IOUT IOUT 6 REXT external resistor aaa-029361 3. Ordering information Table 4. Ordering information Type Package number Name Description Version NCR420U SC-74 TSOP6 plastic surface-mounted package 6 leads SOT457 NCR421U SC-74 TSOP6 plastic surface-mounted package 6 leads SOT457 4. Marking Table 5. Marking codes Type number Marking code NCR420U L6 NCR421U L7 NCR420U NCR421U All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2018. All rights reserved Product data sheet Rev. 1 10 December 2018 2 / 17