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ZHCSDD8D October 2014 – December 2019 TPS1H100-Q1

PRODUCTION DATA.

7.3.4 Full Protections and Diagnostics

Table 1 is when DIAG_EN enabled. When DIAG_EN is low, current sense or ST is disabled accordingly. The output is in high-impedance mode. Refer to Table 2 for details.

Table 1. Fault Table

CONDITIONS	IN	OUT	CRITERION	ST (Version A)	CS (Version B)	Diagnostics Recovery
Normal	L	L		H	0
Normal	H	H		H	In linear region
Short to GND	H	L	Current limit triggered.	L	V_CS,h	AUTO
Open load⁽¹⁾ Short to battery Reverse polarity	H	H	Version A: Output current < I_ol,on Version B: Judged by users	L (deglitch)	Almost 0	AUTO
Open load⁽¹⁾ Short to battery Reverse polarity	L	H	V_VS – V_OUT < V_ol,off	L (deglitch)	V_CS,h (deglitch)	AUTO
Thermal shutdown	H		TSD triggered	L	V_CS,h	Recovery when temp < T_SD,rst
Thermal swing	H		T_sw triggered	L	V_CS,h	AUTO

(1) Need external pullup resistor during off-state

Table 2. DIAG_EN Logic Table

DIAG_EN	IN Condition	Protections and Diagnostics
HIGH	ON	See Table 1
HIGH	OFF	See Table 1
LOW	ON	Diagnostics disabled, protection normal CS or ST is high Impedance
LOW	OFF	Diagnostics disabled, no protections CS or ST is high impedance