HV9911NG-G

Product Summary

The HV9911NG-G is a current mode control LED driver IC designed to control single switch PWM converters (buck, boost or buck-boost), 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 amplifi er to control the output current in closed loop, enabling high output current accuracy (in the case of buck and buck-boost converters, the high side output current can be sensed by using the HV7800). In the constant frequency mode, multiple HV9911NG-Gs can by synchronized to each other, or to an external clock, using the SYNC pin. Programmable MOSFET current limit enables current limiting during input under voltage and output overload conditions. The IC also includes a 0.25A source and 0.5A sink gate driver for high power applications. An internal 9 to 250V linear regulator powers the IC, eliminating the need for a separate power supply for the IC. HV9911NG-G provides a TTL compatible, PWM dimming input that can accept an
external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz. The HV9911NG-G based LED driver is ideal for RGB backlight applications with DC inputs. The HV9911NG-G based LED Lamp drivers can achieve effi ciency in excess of 90% for buck and boost applications.

Parametrics

Absolute maximum ratings:(1)VIN to GND: -0.5V to +250V; (2)VDD to GND: -0.3V to +13.5V; (3)CS1, CS2 to GND: -0.3V to (VDD + 0.3V); (4)PWMD to GND: -0.3V to (VDD + 0.3V); (5)GATE to GND: -0.3V to (VDD + 0.3V); (6)All other pins to GND: -0.3V to (VDD + 0.3V); (7)16-Pin SOIC (derate 6.3mW/掳C above +25掳C): 630mW; (8)Operating Temperature Range: -40掳C to +85掳C; (9)Junction Temperature: +125掳C; (10)Storage Temperature Range: -65掳C to +150掳C.

Features

Features: (1)Switch mode controller for single switch drivers; (2)Works with high side current sensing; (3)Closed loop control of output current; (4)High PWM dimming ratio; (5)Internal 9 to 250V linear regulator (can be extended; (6)using external zener diodes); (7)Internal 2% Voltage Reference (-40掳C<TA<85掳C); (8)Constant frequency or constant off-time operation; (9)Programmable slope compensation; (10)Enable & PWM dimming; (11)+0.25A/-0.5A gate drive (VDD = 10V); (12)Output short circuit protection; (13)Output over voltage protection; (14)Synchronization capability; (15)Programmable MOSFET current limit; (16)Soft start.

Diagrams

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