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A3946KLP-T Datasheet(PDF) 1 Page - Allegro MicroSystems |
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A3946KLP-T Datasheet(HTML) 1 Page - Allegro MicroSystems |
1 / 13 page 3946 Half-Bridge Power MOSFET Controller The A3946 is designed specifically for applications that require high power unidirectional dc motors, three-phase brushless dc motors, or other inductive loads. The A3946 provides two high-current gate drive outputs that are capable of driving a wide range of power N-channel MOSFET s. The high-side gate driver switches an N-channel MOSFET that controls current to the load, while the low-side gate driver switches an N-channel MOSFET as a synchronous rectifier. A bootstrap capacitor provides the above-battery supply voltage required for N-channel MOSFETs. An internal charge pump for the high side allows for dc (100% duty cycle) operation of the half-bridge. The A3946 is available in a choice of two power packages: a 16-lead SOIC with internally fused leads (part number suffix LB), and a 16-lead TSSOP with exposed thermal pad (suffix LP). Both packages have a lead (Pb) free version, with 100% matte tin plated leadframes (suffix -T). On-chip charge pump for 7 V minimum input supply voltage High-current gate drive for driving a wide range of N-channel MOSFETs Bootstrapped gate drive with charge pump for 100% duty cycle Overtemperature protection Undervoltage protection –40ºC to 135ºC ambient operation Load Supply Voltage, V BB ............................. 60 V Logic Inputs ..................................–0.3 V to 6.5 V Pin S……..........................................–4 V to 60 V Pin GH ...........................................–4 V to 75 V Pin BOOT….. ................................–0.6 V to 75 V Pin DT ........................................................ V REF Pin VREG ......................................–0.6 V to 15 V Package Thermal Resistance, R JA A3946KLB..................................... 48 °C/W1 A3946KLB..................................... 38 °C/W2 A3946KLP ..................................... 44 °C/W1 A3946KLP ..................................... 34 °C/W2 Operating Temperature Range, T A .. –40°C to +135°C Junction Temperature, T J...........................+150°C Storage Temperature Range, T S....-55°C to +150°C Notes: 1. Measured on a two-sided PCB with 3 in.2 of 2 oz. copper. 2. Measured on JEDEC standard High-K board. ABSOLUTE MAXIMUM RATINGS A3946KLB SOIC A3946KLP TSSOP with Exposed Thermal Pad 3 4 5 6 7 8 2 1 14 13 12 11 10 9 15 16 VREG CP2 CP1 PGND GL S GH BOOT VBB VREF DT LGND RESET IN2 IN1 ~FAULT FEATURES Scale 1:1 Scale 1:1 3 4 5 6 7 8 2 1 14 13 12 11 10 9 15 16 VREG CP2 CP1 PGND GL S GH BOOT VBB VREF DT LGND RESET IN2 IN1 ~FAULT Selection Guide Part Number Pb-free Packing Package A3946KLB – 47 pieces/tube 16-pin SOIC with internally fused leads A3946KLB-T Yes A3946KLBTR – 1000 pieces/reel A3946KLBTR-T Yes A3946KLP – 96 pieces/tube 16-pin TSSOP with exposed thermal pad A3946KLP-T Yes A3946KLPTR – 4000 pieces/reel A3946KLPTR-T Yes |
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