ISL78100

High Power LED Driver

Product Status: 量産中

OVERVIEW

The ISL78100 is a high-power LED backlight driver with an integrated 36V FET designed to drive up to 8 high-power LEDs in series. The PWM converter runs from an internally generated 1MHz clock. With efficiencies over 90%, the regulator provides tight control of LED current and may be configured in either boost or buck topologies, allowing from 3 to 8 series diodes to be driven from wide input voltages.

LED light level may be controlled either by:
  1. LED DC bias current set via the LEVEL pin, or
  2. External low frequency PWM control via the ENABLE/PWM pin.
In both control modes, optional over-temperature thermal protection of the LED reduces the LED DC bias current above an adjustable set temperature, protecting the LED from thermal damage. An optional fault monitor drives an external FET between the input supply and inductor, providing short circuit current protection for the LED and inductor as well as load dump protection for automotive applications. For low cost applications the pass transistor may be omitted and the fault pin bypassed.

The ISL78100 is packaged in a 20 Ld 4mmx4mm QFN package and is specified for operation over the -40°C to +105°C temperature range.

KEY FEATURES

  • Drives 3 to 8 high-power LEDs in series, up to 32V
  • 2.7V to 16V input voltage range
  • Boost or Buck configurable switch
  • 3A integrated FET
  • Automotive load dump protection
  • Light output temperature compensation
  • LED over-temperature protection
  • LED disconnect
  • PWM/analog light level control
  • Small, 20 Ld 4mmx4mm QFN package
  • AEC-Q100 Compliant
  • Pb-free (RoHS compliant)

PARAMETRICS

Parameters
ISL78100
Basic Information
Production Status
量産中
チャネル当たりのデバイス数
1
DC/DC照明用全電流 (mA)
1000
出力電流/チャネル (mA) (max)
1000
出力電圧 (V) (max)
32
輝度調節
DC or PWM
入力電圧 (V) (max)
16
入力電圧 (V) (min)
2.7
LCD用バックライトサイズ (インチ) (min)
3.5
LCD用バックライトサイズ (インチ) (max)
9
認定レベル
Automotive
ピーク効率 (%)
90
LED数 (max)
8
周波数
1 MHz
IS (max)
3.5 mA
IQ (max)
2.5 µA
ISW (mA) (Typ.)
3600
集積ダイオード
Yes
過電圧保護
Yes
トポロジ
Inductor Boost or Buck
入力電圧範囲 (V)
2.7 to 16
LCD用バックライトサイズ
3.5 to 9
温度範囲
-40 to +105

ブロック図

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