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HV9985

3-Channel, Closed Loop, Switch Mode LED Driver IC

Status: In Production

Features:

  • Switch mode controller for single-switch converters
  • 0.25A sourcing
  • 0.5A sinking
  • Typical ±2% absolute and string-to-string current accuracy (with ±1% sense resistors)
  • High PWM dimming ratio up to 5000:1
  • 10-40V input range
  • Constant frequency operation up to 1.0MHz
  • On-chip clock or external clock option
  • Programmable slope compensation
  • Linear and PWM dimming
  • Output short circuit protection
  • Output over voltage protection
  • Hiccup mode protection
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The HV9985 is a three-channel peak current mode PWM controller for driving single switch converters in a constant output current mode. It can be used for driving either RGB LEDs or multiple channels of white LEDs. The HV9985 features a 40V linear regulator, which provides a 5.0V supply to power the IC. The switching frequencies of the three converters in the IC are controlled either with an external clock signal (the channels operate at a switching frequency of 1/12th of the external clock frequency) or using the internal oscillator. The three channels are positioned 120° out-of-phase to reduce the input current ripple. Each converter is driven by a peak current mode controller with output current feedback. The three output currents can be individually dimmed using either linear or PWM dimming. The IC also includes three disconnect FET drivers which enable high PWM dimming ratios and also helps to disconnect the input in case of an output short circuit condition. The HV9985 includes hiccup mode protection for both open LED and short circuit condition to prevent the IC from shutting down in the case of intermittent faults.

Additional Features
    • Switch mode controller for single-switch converters
    • Gate drivers optimized for driving Logic Level FETs
      • 0.25A sourcing
      • 0.5A sinking
    • Typical ±2% absolute and string-to-string current accuracy (with ±1% sense resistors)
    • High PWM dimming ratio up to 5000:1
    • 10-40V input range
    • Constant frequency operation up to 1.0MHz
    • On-chip clock or external clock option
    • Programmable slope compensation
    • Linear and PWM dimming
    • Output short circuit protection
    • Output over voltage protection
    • Hiccup mode protection
Parametrics
Name
Value
Topology
Boost, SEPIC, Buck
+Vin min (V)
10
+Vin max (V)
40
Output Current
External FET
Dimming
PWM / Linear
Package
QFN-40
Product Type
LED Backlight
lq Typ
1.5mA
Θja (C/W)
18

Documents

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
HV9985QP-G
0.750700
1.152000
44
QSOP
7.5mm(.300in)
Matte Tin
e3
HV9985K6-G
0.104280
0.489796
40
VQFN
6x6x1.0mm
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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