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| DRV10983-Q1 Datasheet, PDF (11/72 Pages) Texas Instruments – Automotive, Three-Phase, Sensorless BLDC Motor Driver | |||
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www.ti.com
8.2 Functional Block Diagram
DRV10983-Q1
SLVSD14 â JUNE 2017
SDA
SCL
SW
VREG
SWGND
V3P3
V1P8
GND
I2C
Communication
5-V Step-Down
Regulator
3.3-V LDO
1.8-V LDO
Oscillator
Band Gap
Register
EEPROM
Charge
Pump
VCC
VCP
Pre-
Driver
VCC
VCP
CPP
CPN
FG
U
U
V
W
SPEED
DIR
V/I
Sensor
ADC
PWM and Analog
Speed Control
Lock
Overcurrent
Thermal
UVLO
Logic
Core
GND
VCC
VCP
Pre-
Driver
VCC
VCP
Pre-
Driver
V
W
PGND
Copyright © 2017, Texas Instruments Incorporated
8.3 Feature Description
8.3.1 Regulators
8.3.1.1 Step-Down Regulator
The DRV10983-Q1 device includes a step-down hysteretic voltage regulator that can operate with either an
external inductor or with an external resistor. The best efficiency is achieved when an external inductor (see
Figure 4) is used. The regulator output voltage is 5 V. When the regulated voltage drops by the hysteresis level,
the high-side FET turns on to raise the regulated voltage back to the target of 5 V. The switching frequency of
the hysteretic regulator is not constant and changes with load.
If the step-down regulator is configured with an external inductor, it can deliver current to the load as specified by
IREG_MAX_L. If the step-down regulator is configured with an external resistor it, can deliver current to the load as
specified by IREG_MAX_R.
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: DRV10983-Q1
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