A5974DTR STMicroelectronics, A5974DTR Datasheet - Page 44

• Manufacturer Part Number: A5974DTR
• Description: IC BUCK ADJ 2.5A 8SOIC
• Manufacturer: STMicroelectronics
• Series: -r
• Type: Step-Down (Buck)r

Specifications of A5974DTR

• Internal Switch(s): -
• Synchronous Rectifier: -
• Number Of Outputs: -
• Voltage - Output: 1.235 V ~ 35 V
• Current - Output: 2.5A
• Frequency - Switching: 250kHz
• Voltage - Input: 4 V ~ 36 V
• Operating Temperature: -
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11424-2

STM8 (cont’d)
Digital constant current controller for multi-string LED driving based on STM8S
Demonstration board features
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STEVAL-ILL031V1
STEVAL-ILL031V2
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Inverse buck topology
LED string independent average current control
Input DC bus voltage: 48 V
System power: 120 W
Switching frequency: 100 kHz
Ripple current: <10%
Global dimming from 0% to 100% at 225 Hz (PWM dimming)
Independent linear dimming on 4 channels
Short-circuit protection (short-to-ground and short-on-LED)
Remote control interface (option)
Suitable for LED street lighting and multicolor LED driving
Sales code
48 V
V IN
PWM1
Board
PWM-2 ADC-2
PWM-1
30 W
ADC-1
Digital constant current controller for LED driving based on STM8S208X
Strip of 10 LEDs for STEVAL-ILL031V1
Microcontroller
STM8S20xx
PWM-3 ADC-3
30 W
Description
PWM-4 ADC-4
30 W
Demonstration board key
benefits
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Accurate LED average current
control for long LED lifetime
Ground referred power MOSFET, no
gate driver need
Low-voltage sensing circuit
Can also work without an output
capacitor
Able to compensate Vf variation due
to thermal issue
High efficiency up to 98%
No flicker
Suitable for RGBW lights
AN3151: Digital constant-current
controller for LED applications based on
STM8S208X
30 W
Technical documents