MCP14700-E/MF Microchip

MCP14700 Dual Input Synchronous MOSFET Driver Features: General Description: Ideally suited to drive low Figure-of-Merit (FOM) The MCP14700 is a high-speed synchronous MOSFETs such as Microchips MCP87000 MOSFET driver designed to optimally drive a high-side MOSFET family and low-side N-Channel MOSFET. It is particularly well suited for driving low-FOM MOSFETs, including Independent PWM Input Control for High-Side Microchips MCP87000 family of high-speed and Low-Side Gate Drive MOSFETs. The MCP14700 has two PWM inputs to Input Logic Level Threshold 3.0V TTL Compatible allow independent control of the external N-Channel Dual Output MOSFET Drive for Synchronous MOSFETs. Since there is no internal cross conduction Applications protection circuitry the external MOSFET dead time High Peak Output Current: 2A (typical) can be tightly controlled allowing for more efficient Internal Bootstrap Blocking Device systems or unique motor control algorithms. +36V BOOT Pin Maximum Rating The transition thresholds for the PWM inputs are typically 1.6V on a rising PWM input signal and typically Low Supply Current: 45 A (typical) 1.2V on a falling PWM input signal. This makes the High Capacitive Load Drive Capability: MCP14700 ideally suited for controllers that utilize 3.0V - 3300 pF in 10.0 ns (typical) TTL/CMOS logic. The PWM inputs are internally pulled Input Voltage Undervoltage Lockout Protection low ensuring the output drive signals are low if the Overtemperature Protection inputs are floating. Space Saving Packages: The HIGHDR and LOWDR peak source current - 8-Lead SOIC capability of the MCP14700 device is typically 2A. While the HIGHDR can sink 2A peak typically, the - 8-Lead 3x3 DFN LOWDR can sink 3.5A peak typically. The low resistance pull-up and pull-down drive allow the Applications: MCP14700 to quickly transition a 3300pF load in 3-Phase BLDC Motor Control typically 10 ns. Bootstrapping for the high-side drive is internally implemented which allows for a reduced High Efficient Synchronous DC/DC Buck system cost and design complexity. Converters High-Current Low Output Voltage Synchronous The MCP14700 features undervoltage lockout (UVLO) DC/DC Buck Converters with a typical hysteresis of 500 mV. Overtemperature protection with hysteresis is also featured on the High Input Voltage Synchronous DC/DC Buck device. Converters Core Voltage Supplies for Microprocessors Package Types MCP14700 SOIC PHASE 1 8 HIGHDR PWM BOOT 2 7 HI PWM V 3 6 LO CC GND 4 5 LOWDR MCP14700 3x3 DFN* PHASE HIGHDR 1 8 PWM BOOT 2 7 EP HI 9 PWM V 3 6 LO CC GND 4 5 LOWDR * Includes Exposed Thermal Pad (EP) see Table 3-1. 2009-2013 Microchip Technology Inc. DS22201B-page 1MCP14700 Typical Application Schematic Synchronous Buck Application V =12V BUCK C BOOT V =5.0V CC CURRENT SENSE BOOT MCP87050 V HIGHDR CC MCP14700 PHASE PWM HI MCP87022 PWM LOWDR LO GND dsPIC33FJ06GS101 PWM1L AN0 CURRENT PWM1H AN1 SENSE 3-Phase BLDC Motor Control Application 24V 24V BOOT BOOT V CC V CC V HIGHDR HIGHDR V CC CC MCP14700 MCP14700 PWM1 PWM5 PWM PHASE PHASE PWM HI H PWM2 PWM6 PWM LOWDR LOWDR PWM LO LO GND GND SENSE SENSE NODE NODE 24V BOOT PWM1 V CC PWM2 V HIGHDR CC PWM3 MCP14700 PWM3 PWM4 PHASE PWM HI PWM5 PWM6 PWM4 PWM LOWDR LO SENSE GND NODE V REF dsPIC DS22201B-page 2 2009-2013 Microchip Technology Inc.