TSCR420CX6H RFG Taiwan Semiconductor

TSCR420 TSCR421 TSCR420CX6H / TSCR421CX6H Taiwan Semiconductor Linear Constant Current Regulated LED Driver DESCRIPTION FEATURES The TSCR420 & TSCR421 are Low-Side Constant AEC-Q100 qualified with the following results: - Device temperature grade 1: -40C to 125C Current Regulator (CCR) for linear LED driving. The - Device HBM ESD classification level H2 device regulates with a preset 10mA nominal that can - Device CDM ESD classification level C6 be adjusted with an external resistor up to 300mA. It is LED drive current preset to 10mA designed for driving LEDs in strings and will reduce Continuous output current up to 300mA with an current at increasing temperatures to self-protect. external resistor Operating as a series linear CCR for LED string Very low enable current current control, it can be used in multiple applications, Easy paralleling of drivers to increase current as long as the maximum supply voltage to the device Supply voltage up to 40V is <40V. Digital PWM input up to 10kHz (TSCR421) With the low-side control, the TSCR421 has an Enable Good temperature coefficient vs. output current (EN) pin which can be pulse-width modulated (PWM) Compliant to RoHS Directive 2011/65/EU and in up to 10kHz by a microcontroller for LED dimming. accordance to WEEE 2002/96/EC. The output current at higher temperatures is the result Halogen-Free according to IEC 61249-2-21 of the negative temperature coefficient of 0.07%/C of APPLICATION the LED driver. Automotive Lighting Architectural LED lighting, emergency lighting Signage, Advertising, Decorative Lighting Retail Lighting in Fridges and Vending Machines SOT-26 Pin Definition: 1. EN 6. R EXT 2. OUT 5. OUT 3. OUT 4. GND Notes: MSL 1 (Moisture Sensitivity Level) per J-STD-020 TYPICAL APPLICATION CIRCUIT Vs Supply LED String EN OUT Regulator Vref Vref C EN R EXT R (Optional) INT GND 1 Version: A1812 TSCR420CX6H / TSCR421CX6H Taiwan Semiconductor (Note 1) ABSOLUTE MAXIMUM RATINGS (T = 25C unless otherwise specified) A PARAMETER SYMBOL LIMIT UNIT TSCR420 40 Enable voltage V V EN 4.5 TSCR421 Output current I 300 mA OUT Output voltage V 40 V OUT V 0.5 V Reverse voltage between all terminals R (Note) Total power dissipation T =25 C P 1 W A TOT T -55 to +150 C Junction temperature range J Operating ambient temperature range T -40 to +125 C A T -65 to +150 C Storage temperature range STG ESD Rating (Human Body Model) HBM 2 kV CDM 1 kV ESD Rating (Charge Device Model) Note: Stresses above the max. values listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Maximum ratings are absolute ratings exceeding only one of these values may cause irreversible damage to the integrated circuit. THERMAL PERFORMANCE PARAMETER SYMBOL TYP UNIT Thermal Resistance - Junction to Ambient R 225 C/W JA Thermal Resistance - Junction to Case R 125 C/W JC Thermal Resistance - Junction to Lead R 145 C/W JL ELECTRICAL SPECIFICATIONS (T = 25C unless otherwise noted) A PARAMETER CONDITIONS SYMBOL MIN TYP MAX UNIT Break Down Voltage V 40 -- -- V BR V =24V TSCR420 -- 450 -- A EN Enable Current I EN V =3.3V TSCR421 EN -- 36 -- A I =10mA Internal Resistor R 85 95 105 RINT INT V =1.4V, V =24V TSCR420 OUT EN 9 10 11 Output Current V =1.4V, V =3.3V TSCR421 9 10 11 OUT EN I mA OUT V >2.0V, V =24V TSCR420 OUT EN -- 150 -- Output Current at R =5.1 V >2.0V, V =3.3V TSCR421 -- 150 -- EXT OUT EN I =10mA Voltage Drop (V ) OUT V 0.85 0.95 1.05 V REXT DROP Minimum Output Voltage I >18mA V -- 1.4 -- V OUT OUT(MIN) V >2.0V, V =24V TSCR420 OUT EN -- -0.07 -- Output Current I /I %/C OUT OUT vs. Temperature V >2.0V, V =3.3V TSCR421 -- -0.07 -- OUT EN V >2.0V, V =24V TSCR420 OUT EN -- 0.33 -- Output Current I /I %/V OUT OUT vs. Supply Voltage V >2.0V, V =3.3V TSCR421 -- 0.33 -- OUT EN 2 Version: A1812