A5974DTR STMicroelectronics, A5974DTR Datasheet - Page 22

• 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

Linear current regulators
STCSx
The STCSx family is a BiCMOS constant-current source designed to provide a
precise constant current starting from a varying input voltage source. It is designed
to replace discrete-component LED driving solutions in low-voltage applications
including 5 V supplies, 12 V or 24 V, providing benefits in terms of precision,
integration and reliability.
An external resistor is used to set the current up to 2 A with a ± 10 % precision; a
dedicated pin can be used for PWM dimming. An open-drain pin output provides
information on load disconnection conditions.
Key features
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Application example
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STEVAL-ILL014V1
STEVAL-ILL030V1
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Adjustable current set from 0.1 A to 2.0 A (STCS2/A), 1.5 A (STCS1/A),
500 mA (STCS05/A)
Adjustable turn-on ramp-up from 10 μs to 10 ms, set with external capacitor to
reduce the EMI noise
Microprocessor-compatible dimming input that turns the LED current on/off
MLP-8L 3x3 mm and PowerSO8 (STCS1), SO8 (STCS05),
PowerSO10 (STCS2)
Sales code
Board
Constant-current controller for high-brightness LEDs based on STCS1A
LED lighting control using DMX512 control based on STM32F102C6T6 and
STCS1APHR
4.5 V to 40 V
Input voltage
Load disconnection
VCC
PWM
EN
Description
DISC
SLOPE GND
STCSx
DRAIN
FB
Key benefits
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DNF8 (3x3)
Supports wide range of screen sizes
from small netbooks to wide-screen
notebooks with one device
High integration, so only a few and
small (cheap) external components
Outstanding efficiency for longer
battery life and energy saving
UM0422: Constant current controller for
high brightness LEDs
UM1004: DMX512-based LED lighting
solution
Technical documents
PowerSO-8
PowerSO-10