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參數(shù)資料
| 型號(hào)： | L99PM62XP |
| 廠商： | STMICROELECTRONICS |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36 |
| 封裝： | ROHS COMPLIANT, POWERSSO-36 |
| 文件頁(yè)數(shù)： | 7/98頁(yè) |
| 文件大小： | 1117K |
| 代理商： | L99PM62XP |
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L99PM62XP
Description
Doc ID 16363 Rev 2
Short to ground detection
If 4 ms after turn on of the regulator the V1,2 voltage is below the V1,2 fail thresholds,
(independent for V1,2), the L99PM62XP identifies a short circuit condition at the related
regulator output and the regulator is switched off.
In case of V1 short to GND failure the device enters VBAT standby mode automatically. Bits
Forced VBAT STD2/SHTV1 and V1 fail were set.
In case of a V2 short to GND failure the V2short and V2 fail bit is set.
If the output voltage of the corresponding regulator once exceeded the V1,2 fail thresholds
the short to ground detection is disabled. If a short to ground condition occurs the regulator
outputs switches off due to thermal shutdown (V1 at TSD2; V2 at TSD1).
2.1.5
Voltage regulator behaviour
Figure 7.
Voltage regulator behaviour and diagnosis during supply voltage ramp-up / ramp-
down conditions
2.2
Operating modes
The L99PM62XP can be operated in 4 different operating modes:
●
Active
●
Flash
●
V1 standby
●
VBAT standby
Vs [ V ]
V1 [ V ]
Nreset
[ V ]
12
V1N+VDP1
VPOR
Cold Start bit is set
100us
VRTH
High
Low
Power-on-Reset threshold
V1fail
If t >4ms
V1 short detected
Vbatt standby
2us
V1fail bit is set
Vsuv bit ist set
t < tFT
tRR
t > tFT
No Reset generated
t > tFT
Specification Parameters
tFT : V1 undervoltage Filter Time (16s)
tRR : Reset Reaction Time: (20s)
tWDR : Watchdog Reset Pulse Time (2ms)
tWDR
VSUV
Inactive
Active
Inactive
Read & Clear FSO Bit
V1N
Control Registers are set to default values
Disabled
VABS min
High Z Grounded
Control Registers are
set to default values
Fail Safe Output
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