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A4935KJP-T Datasheet

  • A4935KJP-T

  • Automotive 3-Phase MOSFET Driver

  • 442.74KB

  • 24頁

  • ALLEGRO   ALLEGRO

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A4935
Automotive 3-Phase MOSFET Driver
Features and Benefits
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High current 3-phase gate drive for N-channel MOSFETs
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Cross-conduction protection with adjustable dead time
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Top-off charge pump for 100% PWM
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Charge pump for low supply voltage operation
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Uncommitted current sense amplifier
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5.5 to 50 V supply voltage range
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Compatible with 3.3 V and 5 V logic
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Extensive diagnostic outputs
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Low-current sleep mode
Description
The A4935 is a 3-phase controller for use with N-channel
external power MOSFETs and is specifically designed for
automotive applications.
A unique charge pump regulator provides full (>10 V) gate
drive for battery voltages down to 7 V and allows the A4935
to operate with a reduced gate drive, down to 5.5 V.
A bootstrap capacitor is used to provide the above-battery
supply voltage required for N-channel MOSFETs. An internal
charge pump for the high-side drive allows DC (100% duty
cycle) operation.
Full control over all six power FETs in the 3-phase bridge is
provided, allowing motors to be driven with block commutation
or sinusoidal excitation. The power FETs are protected from
shoot-through by integrated crossover control and resistor-
adjustable dead time.
Bridge current can be measured using an integrated current
sense amplifier. This is an uncommitted differential amplifier
with a below-ground common mode range allowing it to be
used in low-side current sense applications. Gain and offset
are defined by external resistors.
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Package: 48-pin LQFP with exposed
thermal pad (suffix JP)
Not to scale
Typical Application
VBAT
A8450
Regulator
VBAT
Control
DSP
or
Micro-
controller
A4935
3-Phase
BLDC
Motor
Diagnostics
Current Sense
4935-DS

A4935KJP-T 產(chǎn)品屬性

  • 250

  • 集成電路 (IC)

  • PMIC - MOSFET，電橋驅(qū)動(dòng)器 - 外部開關(guān)

  • -

  • 3 相橋

  • PWM

  • 90ns

  • -

  • 1

  • 3

  • -

  • 5.5 V ~ 50 V

  • -40°C ~ 150°C

  • 表面貼裝

  • 48-LQFP 裸露焊盤

  • 48-LQFP 裸露焊盤（7x7）

  • 托盤

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