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HV9919B

Hysteretic, Buck, High Brightness LED Driver w/ High-Side Current Sensing

Status: In Production

Features:

  • Hysteretic control with high-side current sensing
  • Wide input voltage range: 4.5 to 40V
  • >90% Efficiency
  • Typical ±5% LED current accuracy
  • Up to 2.0MHz switching frequency
  • Adjustable constant LED current
  • Analog or PWM control signal for PWM dimming
  • Over-temperature protection
  • -40ºC to +125ºC operating temperature range
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The HV9919B is a PWM controller IC designed to drive high brightness LEDs using a buck topology. It operates from an input voltage of 4.5 to 40VDC and employs hysteretic control with a high-side current sense resistor to set the constant output current. The operating frequency range can be set by selecting the proper inductor. Operation at high switching frequency is possible since the hysteretic control maintains accuracy even at high frequencies. This permits the use of small inductors and capacitors minimizing space and cost in the overall system. LED brightness control is achieved with PWM dimming from an analog or PWM input signal. Unique PWM circuitry allows true constant color with a high dimming range. The dimming frequency is programmed using a single external capacitor. The HV9919B comes in a small, 8-Lead DFN package and is ideal for industrial and general lighting applications.

Additional Features
  • Hysteretic control with high-side current sensing
  • Wide input voltage range: 4.5 to 40V
  • >90% Efficiency
  • Typical ±5% LED current accuracy
  • Up to 2.0MHz switching frequency
  • Adjustable constant LED current
  • Analog or PWM control signal for PWM dimming
  • Over-temperature protection
  • -40ºC to +125ºC operating temperature range
Parametrics
Name
Value
Topology
Buck
+Vin min (V)
4.5
+Vin max (V)
40
Output Current
External FET
Dimming
PWM
Package
DFN-8
Product Type
DC/DC
Type
High-side current sensing
Operating Iq (µA)
1.5
Switching Frequency
2MHz
ILED Accuracy
±5%
Θja (C/W)
60

Documents

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Data Sheets

User Guides

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
HV9919BDB1 Demo Board
HV9919BDB1 Demo Board ( HV9919BDB1 )

The HV9919BDB1 demoboard is a high current LED driver designed to drive one LED at 1.0A from a 9.0 - 16V DC input. The demoboard uses HV9919 hysteretic buck LED driver IC.  

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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
HV9919BK7-G
0.020780
0.118788
8
WDFN
3x3x0.8mm
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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