HV9985K6-G Microchip

Supertex inc. HV9985 Three-Channel, Closed-Loop, Switch Mode LED Driver IC Features General Description Switch mode controller for single-switch The HV9985 is a three-channel peak current mode PWM controller for driving single switch converters in a constant converters output current mode. It can be used for driving either RGB LEDs Gate drivers optimized for driving Logic Level FETs or multiple channels of white LEDs. 0.25A sourcing 0.5A sinking The HV9985 features a 40V linear regulator, which provides a Typical 2% absolute and string-to-string current 5.0V supply to power the IC. The switching frequencies of the accuracy (with 1% sense resistors) three converters in the IC are controlled either with an external High PWM dimming ratio up to 5000:1 clock signal (the channels operate at a switching frequency 10-40V input range of 1/12th of the external clock frequency) or using the internal Constant frequency operation up to 1.0MHz oscillator. The three channels are positioned 120 out-of-phase On-chip clock or external clock option to reduce the input current ripple. Each converter is driven by a Programmable slope compensation peak current mode controller with output current feedback. Linear and PWM dimming The three output currents can be individually dimmed using Output short circuit protection either linear or PWM dimming. The IC also includes three Output over voltage protection disconnect FET drivers which enable high PWM dimming ratios Hiccup mode protection and also helps to disconnect the input in case of an output short Applications circuit condition. The HV9985 includes hiccup mode protection for both open LED and short circuit condition to prevent the IC RGB backlight applications from shutting down in the case of intermittent faults. Boost, buck & SEPIC topologies Multiple string white LED driver applications Typical Application Circuit D1b (Optional) Q1a L1 C C D1a IN IN1 R OVP1a C O1 C SC1 R R CS1 OVP1b C C VDD VDD1 R SC1 VDD VDD1 GT1CS1 GND1 OVP1 Q1b VIN FLT1 GND HV9985 FDBK1 EN (One Channel Shown) COMP1 RT C C1 R PWMD1 CLK SKIP REF1 T R S REF C C R SKIP REF1 REF1 Doc. DSFP-HV9985 Supertex inc. C051513 www.supertex.comHV9985 Pin Configuration Ordering Information Part Number Package Option Packing HV9985K6-G* 40-Lead QFN (6x6) 490/Tray 40 VDD1 1 VDD3 HV9985K6-G M935* 40-Lead QFN (6x6) 2000/Reel FLT1 FLT3 HV9985QP-G* 44-Lead QSOP 1000/Reel -G denotes a lead (Pb)-free / RoHS compliant package CS1 CS3 * Product is not recommended for new designs. Contact factory for availiability. COMP1 COMP3 FDBK1 FDBK3 Absolute Maximum Ratings GND REF1 REF3 Parameter Value OVP1 OVP3 VIN to GND -0.3V to +45V VIN CLK VDD to GND, VDD 1-3 to GND -0.3V to +6.0V VDD RT All other pins to GND -0.3V to (V + 0.3V) DD EN NC Junction temperature -40C to +125C Storage ambient temperature range -65C to +150C Continuous power dissipation (T = +25C) 4000mW A 40-Lead QFN Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and (top view) functional operation of the device at these or any other conditions beyond 1 44 those indicated in the operational sections of the specifications is not implied. REF1 FDBK1 Exposure to absolute maximum rating conditions for extended periods may COMP1 OVP1 affect device reliability. CS1 VIN FLT1 VDD EN VDD1 NC NC Thermal Resistance GND GATE1 Package GND1 NC ja FDBK2 COMP2 O 40-Lead QFN 24 C/W REF2 CS2 OVP2 FLT2 O 44-Lead QSOP 50 C/W SKIP GATE2 NC GND2 for QFN package is based on a 4 layer PCB as per JESD51-9 ja VDD2 PWMD1 for QSOP package is based on a 4 layer PCB as per JESD51-7 GND3 PWMD2 ja PWMD3 GATE3 NC NC NC VDD3 FLT3 RT CS3 CLK OVP3 COMP3 REF3 FDBK3 44-Lead QSOP (top view) Product Marking Top Marking YY = Year Sealed YYWW AAA HV9985QP WW = Week Sealed LLLLLLLLLL L = Lot Number L = Lot Number HV9985 YY = Year Sealed Bottom Marking C = Country of Origin LLLLLL WW = Week Sealed A = Assembler ID A = Assembler ID YYWW C = Country of Origin CCCCCCCCCCC AAACCC = Green Packaging = Green Packaging Package may or may not include the following marks: Si or Package may or may not include the following marks: Si or 40-Lead QFN 44-Lead QSOP Doc. DSFP-HV9985 Supertex inc. C051513 2 www.supertex.com GATE1 GND GND1 COMP2 FDBK2 REF2 CS2 OVP2 FLT2 SKIP GATE2 NC GND2 PWMD1 VDD2 PWMD2 GND3 PWMD3 GATE3 NC