Microchip Technology HV9911
The HV9911 is an LED driver IC designed to control single-switch PWM converters (buck, boost, buck-boost and SEPIC) in a Constant Frequency or Constant Off-time mode. The controller uses a peak current control scheme with programmable slope compensation and includes an internal transconductance amplifier to control the output current in closed loop, enabling high output current accuracy. The IC also includes a 0.2A source and 0.4A sink gate driver for high-power applications.| Part No. | HV9911 |
|---|---|
| Datasheet | HV9911 Download |
| Manufacturer |  Microchip Technology |
| Description | Switch-Mode LED Driver |
| Buy | Stock & Price |
FEATURES
● Switch-mode Controller for Single-switch Drivers: - Buck - Boost - Buck-boost - SEPIC● Works with High-side Current Sensing
● Closed-loop Control of Output Current
● High Pulse-Width Modulation (PWM) Dimming Ratio
● Internal 250V Linear Regulator (can be extended using external Zener Diodes)
● Internal 2% Voltage Reference (0°C < TA < 85°C)
● Constant Frequency or Constant Off-time Operation
● Programmable Slope Compensation
● Logic Input for Enable and PWM Dimming
● +0.2A/-0.4A Gate Driver
● Output Short-circuit Protection
● Output Overvoltage Protection
● Synchronization Capability
● Programmable Metal-Oxide Semiconductor Field-Effect Transistor (MOSFET) Current Limit
APPLICATIONS
● RGB BacklightAPPLICATIONS
● Battery-powered LED Lamps● Other DC/DC LED Drivers
GENERAL DESCRIPTION
In the Constant Frequency mode, multiple HV9911s can be synchronized with each other or with an external clock using the sync pin. Programmable MOSFET current limit enables current limiting during Input Undervoltage and Output Overload conditions.
