STPM098C datasheet(55/110 Pages) STMICROELECTRONICS

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3.12.1.2

TSEN voltage monitor

TSENn voltage level is monitored by means of dedicated UV and OV diagnosis.

Figure 44. TSEN voltage monitor simplified block diagram

TSENn

VBG

TSENn_OV

TSENn_UV

GND

VBG

GND

If TSENn ≤ TSEN_uv_th occurs for an interval longer than T_tsen_uv_flt, the flag TSENn_UV flag is set. Fault

pins and safe state activation depends on FHC configuration. TSENn_UV clearing depend on FHC configuration

[n = 1, 2].

If TSENn ≥ TSENn_ov_th occurs for an interval longer than T_tsen_ov_flt, the flag TSENn_OV flag is set. Fault

pins and safe state activation depends on FHC configuration. TSENn_OV clearing depend on FHC configuration

[n = 1, 2].

TSEN monitor is safety relevant and then a self-check procedure is implemented.

Figure 45. TSEN voltage monitor timing diagram

TSENn_OV

(Internal signal)

TSENn_UV

(Internal signal)

TSENnOV_TH

OPERATIVE

TSENn_UV_TH

T_tsen_ov_flt

T_tsen_uv_flt

T_tsen_ov_flt

TSENn

T_tsen_uv_flt

Table 46. TSEN voltage monitor electrical characteristics

Symbol

Parameter

Test condition

Min Typ Max Unit

Notes

TSEN_uv_th

TSEN undervoltage threshold

0.18 0.2 0.21

Comparator output Low to

high

TSEN _uv_hys TSEN undervoltage hysteresis

mV -

STPM098C

Functional description

DS14440 - Rev 1

page 55/110

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