Specifications

Gate Driver
Diagnostics
and Protection
Current Limit
IN
ST
CL
CS
SOURCE(OUT)
DRAIN (VS)
VDS Clamp
DIAG_EN
GND
Charge PumpInternal LDO
Internal
Reference
Current Sense
Open Load
Detection
Thermal
Monitor
TPS1H100-Q1
SLVSCM2A –OCTOBER 2014–REVISED JANUARY 2014 www.ti.com
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 Accurate Current Sense
For version B, the high-accuracy current sense function is internally implemented, which allows a better realtime
monitoring effect and more accurate diagnostics without further calibration. A current mirror is used to source 1 /
K of the load current, flowing out to the external resistor between the CS pin and GND, and reflected as voltage
on CS pin.
K is the ratio of the output current and the sense current. It is a constant value across the temperature and
supply voltage. Each device was internally calibrated while in production, so post-calibration by users is not
required in most cases.
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