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AT9932

Automotive Boost-Buck LED Lamp Driver IC

Status: In Production

Features:

  • Constant output current
  • Steps output voltage up or down
  • Very low susceptibility to Input voltage transients
  • Frequency jitter
  • Externally programmable fixed switching frequency
  • Temperature foldback with external NTC resistor
  • Internal 40V voltage regulator
  • +/-1A MOSFET gate driver
  • Short LED protection
  • Open LED protection
  • Input undervoltage protection
  • Enable & PWM dimming
  • Trimmed reference (±3% accurate)
  • AEC-Q100 compliant
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The AT9932 is an advanced fixed frequency PWM controller IC designed to control an LED lamp driver using a boost-buck topology that can step the input voltage up or down automatically. The IC provides fast output current transient response and very low susceptibility to input voltage transients, which allows the lamp driver to pass the rigorous electrical transient requirements of SAE J1455 or ISO 7637-2, making the AT9932 an ultimate solution for automobile lighting. Capacitive isolation protects the LED Lamp from failure of the switching MOSFET. The AT9932 features a unique feed-forward current control scheme, differential output current sensing, soft start, protection from short or open LED load. Switching frequency can be programmed with a single external resistor. The AT9932 includes a temperature fold-back of the output current using an external NTC resistor. This feature allows maximizing the light output of the LED load over the entire operating temperature range.

Additional Features
  • Constant output current
  • Steps output voltage up or down
  • Very low susceptibility to Input voltage transients
  • Frequency jitter
  • Externally programmable fixed switching frequency
  • Temperature foldback with external NTC resistor
  • Internal 40V voltage regulator
  • +/-1A MOSFET gate driver
  • Short LED protection
  • Open LED protection
  • Input undervoltage protection
  • Enable & PWM dimming
  • Trimmed reference (±3% accurate)
  • AEC-Q100 compliant
Parametrics
Name
Value
Topology
Boost-Buck (Cuk)
+Vin min (V)
5.3
+Vin max (V)
40
Output Current
External FET
Dimming
PWM / Linear
Package
TSSOP-24

Documents

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Similar Devices

Product
Topology
+Vin min (V)
+Vin max (V)
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Boost, SEPIC
5.3
40
$1.42
Buck
4.5
40
$0.73
Boost-Buck (Cuk)
5.3
40
$1.57
Boost-Buck (Cuk)
9
75
$0.90
Buck
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$0.82

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
AT9932TS-G
0.073500
0.212400
24
TSSOP
4.4mm
Matte Tin
e3
AT9932TS-GVAO
0.073500
0.212400
24
TSSOP
4.4mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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