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NT3875B

Noveltek
Part Number NT3875B
Manufacturer Noveltek
Description Wide Input Range CC/CV Step Down Converter
Published May 9, 2014
Detailed Description Conceptual NT3875A/B Wide Input Range CC/CV Step Down Converter General Description The NT3875 is a step down PWM conv...
Datasheet PDF File NT3875B PDF File

NT3875B
NT3875B

Overview
Conceptual NT3875A/B Wide Input Range CC/CV Step Down Converter General Description The NT3875 is a step down PWM converter with driving a output current up to 2A (NT3875A) a nd 1A (NT3875B) without a dditional tra nsistor.
It is de signed to allow f or operating a wide supply voltage ra nge from 8V to 40V .
The external shutdown function ca n be controlled by logic level to pull COMP/EN pin down, and then comes into standby mode.
The external compensation makes feedba ck control have good line and load regulation with flexible extern al design.
The NT3875 fe atures a progra mmable CV/CC mode control function s.
The CV mode (con stant voltage) function provides a regulated voltage output a nd the CC mode (constant current) function provide s a current li mitation function.
The CC current value is set by external resister during current sense amplifier input stage.
The NT3875 is suita ble for the DC/DC switching power applications when reque sted the current li mit function.
The devices are available in SOP-8L and PSOP-8L packages and require very few extern al devices for operation.
Features  VIN Operate with 8V ~ 40V Supply V oltage  V OUT Accura cy (Vref =1.
2V) +1.
0% Over Line Voltage  CC / CV Mode Control (Constant Current and Constant Voltage)  +/- 5% Current Limit Accuracy  Output Short Circuit Protection  Output Over Voltage Protection (~120%)  Over Temperature Prote ction  Internal Soft Start ~ 7ms  Fixed Frequency 120 KHz  UVLO Protection (min=6V, typ=7V, max=8V)  Duty Cycle Range (0~90%)  Single Pin to External Compensation and Shutdown Control  Integrated Power N-MOSFET   Rds_on=150m ohm for NT3875A Rds_on=240m ohm for NT3875B Applications  Car Charger  Portable Charger Devices  High-Brightness Lighting  General-Purpose DC/DC Converters with Current Limit  (P)SOP- 8L Package Ordering Information Oe rder Number NL T3875ASA8 NL T3875ASW8 NL T3875BSA8 Pk a cka g SA OP-8 PA SOP-8 SA OP-8 Remar Output Current = 2 Output Current = 2 Outp...


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