NCR420Z / NCR421Z

150 mA LED driver in SOT223

Rev. 1 — 4 February 2019

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 a medium

power SOT223 (SC73) plastic package.

Table 1. Product overview

Package

Type number

Nexperia

JEITA

NCR420Z

SOT223

SC-73

NCR421Z

SOT223

SC-73

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 1250 mW

• Supply voltage up to 40 V

• Digital PWM input up to 10 kHz frequency for NCR421Z

• 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 drivers