DRV10983ZPWPR datasheet(13/58 Pages) TI1

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VCC

SWGND

VREG

3.3 V/5 V

Load

47 µH

10 µF

VCC

SWGND

VREG

3.3 V/5 V

10 µF

DRV10983

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SLVSCP6C – JULY 2014 – REVISED MAY 2016

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9.3 Feature Description

9.3.1 Regulators

9.3.1.1 Step-Down Regulator

The DRV10983 includes a step-down voltage regulator that can be operated as either a switching buck style

regulator or as a linear regulator (see Figure 4). The regulator output voltage can be configured by register bit

VregSel. When VregSel = 0, the regulator output voltage is 5 V, and when VregSel = 1, the regulator output

voltage is 3.3 V.

If the step-down regulator is configured as buck style, refer to IREG_MAX in the Electrical Characteristics to

determine the amount of current provided for external load. If the step-down regulator is configured as linear

mode, it is used for the device internal circuit only.

Buck Regulator

Linear Regulator

Figure 4. Step-Down Regulator Configurations

9.3.1.2 3.3-V and 1.8-V LDO

The DRV10983 includes a 3.3-V LDO and an 1.8-V LDO. The 1.8-V LDO is for internal circuit only. The 3.3-V

LDO is mainly for internal circuits, but can also drive external loads not to exceed IV3P3_MAX listed in the Electrical

Characteristics . For example, it can work as a pullup voltage for the FG, DIR, SDA, and SCL interface.

Both V1P8 and V3P3 capacitor must be connected to GND.

9.3.2 Protection Circuits

9.3.2.1 Thermal Shutdown

The DRV10983 has a built-in thermal shutdown function, which shuts down the device when junction

temperature is more than TSDN ˚C and recovers operating conditions when junction temperature falls to TSDN –

TSDN_HYS˚C.

The OverTemp status bit (address 0x10 bit 7) is set during thermal shutdown.

9.3.2.2 UVLO

The DRV10983 has a built-in UVLO function block. The hysteresis of UVLO threshold is VUVLO-HYS. The device is

locked out when VCC is down to VUVLO_F and woke up at VUVLO_R.

9.3.2.3 Current Protection

The overcurrent shutdown function acts to protect the device if the current, as measured from the FETs, exceeds

the IOC-limit threshold. It protects the device from phase to phase short-circuit conditions; the DRV10983 places

the output drivers into a high-impedance state and maintains this condition until the overcurrent is no longer

present. The OverCurr status bit (address 0x10 bit 5) is set.

The DRV10983 also provides acceleration current limit and lock detection current limit functions to protect the

device and motor (see Current Limit and Lock Detect and Fault Handling ).

DRV10983ZPWPR 数据表(PDF) 13 Page - Texas Instruments

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