AS1123-BTST Integrated Circuits (ICs)

Voltage - Output:	0 V ~ 5.5 V
Supplier Device Package:	24-QSOP
Package / Case:	24-SSOP (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Signage
Dimming:	--
Frequency:	30MHz
Current - Output / Channel:	40mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	3V
Number of Outputs:	16
Internal Switch(s):	Yes
Topology:	Shift Register
Type:	Linear
Part Status:	Active
Packaging:	Tape & Reel (TR)

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AS1123-BTST Application Field and Working PrincipleAS1123-BTST is a High Brightness LED (HB LED) driver from ams company which is specially designed for driving high power LEDs in a variety of applications. It is usually used for automotive headlight, automotive fog lights, and rear view mirror illumination applications.The AS1123-BTST is a highly integrated device featuring onboard high-voltage boost, current sense, and protection circuits which provide the highest level of performance and integration. It has a wide input voltage range of 4.5 V to 28V and can drive up to 8A of current. The output current can be adjusted via two external sense resistors and two external trim pins. The output current can be adjusted from minimum 50 mA to maximum 8 A. The device also features a built-in LED dimming capability as well as over temperature and over load protections. The AS1123-BTST works based on the principle of buck-boost power conversion, which is widely used for providing the advantages of buck and boost operation. The device utilizes a buck-boost topology to drive the LEDs. It is designed to maintain the output current within a range and control the output switching frequency based on the current setpoint and input voltage level. In addition, the device also provides a high level of current output accuracy by means of an internal adaptive current loop. The AS1123-BTST device also features an internal power MOSFET which is used to control the output current and voltage. The device supports a wide variety of switching frequencies ranging from 200kHz to 1MHz and can be configured via external components. It also includes an integrated short-circuit protection circuit which can protect the MOSFETs from overvoltage conditions. In conclusion, the AS1123-BTST is a highly integrated device which is specially designed for driving high-power LEDs. It provides flexibility and high efficiency for a variety of applications, including automotive headlight, fog light, and rear view mirror illumination applications. It has a wide input voltage range and can support a wide range of output current levels and switching frequencies. It also features adjustable current sense, dimming control, and a comprehensive set of protection features.

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Part Number	Manufacturer	Price	Quantity	Description