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参数资料
| 型号： | L99PM62XPTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 电源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36 |
| 封装： | ROHS COMPLIANT, POWERSSO-36 |
| 文件页数： | 28/98页 |
| 文件大小： | 1117K |
| 代理商： | L99PM62XPTR |
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Protection and diagnosis
L99PM62XP
Doc ID 16363 Rev 2
3
Protection and diagnosis
3.1
Power supply fail
Over and under-voltage detection on Vs
3.1.1
Vs overvoltage
If the supply voltage Vs reaches the over voltage threshold (VSOV):
●
Outputs OUTx, RELx and LIN are switched to high impedance state (load protection).
CAN is not disabled. Recovery of outputs when the overvoltage condition disappears is
depending on the setting of VLOCKOUT_EN bit in Control Register 4.
–
VLOCKOUT_EN = 1: Outputs are off until read and clear SR3.
–
VLOCKOUT_EN = 0: Outputs switch automatically on when overvoltage condition
disappears.
●
The over voltage bit is set and can be cleared with a ‘Read and Clear’ command. The
overvoltage bit is removed automatically if VLOCKOUT_EN = 0 and the overvoltage
condition disappears.
●
Outputs REL1,2 can be excluded from a shutdown in case of overvoltage by SPI
(LSOVUV_ Shutdown_en in CR4)
3.1.2
Vs undervoltage
If the supply voltage Vs drops below the under voltage threshold voltage (VSUV)
●
Outputs OUTx, RELx and LIN are switched to high impedance state (load protection).
CAN is not disabled. Recovery of outputs when the undervoltage condition disappears
is depending on the setting of VLOCKOUT_EN bit.
VLOCKOUT_EN = 1: Outputs are off until read and clear SR3.
VLOCKOUT_EN = 0: Outputs switch on automatically when undervoltage condition
disappears.
●
The undervoltage bit is set and can be cleared with a ‘Read and Clear’ command. The
undervoltage bit is removed automatically if VLOCKOUT_EN = 0 and the undervoltage
condition disappears
●
Outputs REL1,2 can be excluded from a shutdown in case of undervoltage by SPI
(LSOVUV_shutdown_en in CR4)
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