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LED driver. STCS1A Datasheet








STCS1A driver. Datasheet pdf. Equivalent





Part

STCS1A

Description

1.5A max constant current LED driver

Manufacture

STMicroelectronics

Datasheet
Download STCS1A Datasheet


STMicroelectronics STCS1A

STCS1A; STCS1A 1.5 A max constant current LED dr iver Features ■ Up to 40 V input vol tage ■ Less than 0.5 V voltage overhe ad ■ Up to 1.5 A output current ■ P WM dimming pin ■ Shutdown pin ■ LED disconnection diagnostic ■ Slope con trol with external cap Applications ■ LED constant current supplying for var ying input voltages ■ Low voltage lig hting ■ Small appliances LED lightin.


STMicroelectronics STCS1A

g ■ Car LED lights Description The STC S1A is a BiCMOS constant current source designed to provide a precise constant current starting from a varying input voltage source. The main target is to r eplace discrete components solution for driving LEDs in low voltage applicatio ns such as 5 V, 12 V or 24 V giving ben efits in terms of precision, integratio n and reliability. DFN8 (3 x 3 mm) Power SO-8 The current is set with external resistor up to 1. 5 A with a ± 10 % precision; a dedicat ed pin allows implementing PWM dimming. An external capacitor allows setting t he slope for the current rise from tens of microseconds to tens of millisecond s allowing reduction of EMI. An open-dr ain pin output provides information on load disconnection .







 STCS1A
STCS1A
1.5 A max constant current LED driver
Features
Up to 40 V input voltage
Less than 0.5 V voltage overhead
Up to 1.5 A output current
PWM dimming pin
Shutdown pin
LED disconnection diagnostic
Slope control with external cap
Applications
LED constant current supplying for varying
input voltages
Low voltage lighting
Small appliances LED lighting
Car LED lights
Description
The STCS1A is a BiCMOS constant current
source designed to provide a precise constant
current starting from a varying input voltage
source. The main target is to replace discrete
components solution for driving LEDs in low
voltage applications such as 5 V, 12 V or 24 V
giving benefits in terms of precision, integration
and reliability.
DFN8 (3 x 3 mm)
Power SO-8
The current is set with external resistor up to 1.5
A with a ± 10 % precision; a dedicated pin allows
implementing PWM dimming. An external
capacitor allows setting the slope for the current
rise from tens of microseconds to tens of
milliseconds allowing reduction of EMI.
An open-drain pin output provides information on
load disconnection condition.
Table 1. Device summary
Order codes
STCS1APUR
STCS1APHR
July 2008
Packages
DFN8 (3 x 3 mm)
Power SO-8
Rev 2
Packaging
3000 parts per reel
2500 parts per reel
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www.st.com
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 STCS1A
Contents
Contents
STCS1A
1
Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7
Detail description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.1 Current setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.2 Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.3 PWM Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.4 Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1 Reverse polarity protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.2 Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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