参数资料
| 型号： | SC824ULTRT |
| 厂商： | Semtech |
| 文件页数： | 23/29页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MANAGEMENT |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | SC824ULDKR |
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SC824
Applications Information (continued) — Charger Logical State Machine
UVLO or POR or (VIN < VOUT + δ )
or NTC_Disable (asynchronously)
Constant Current
Regulation
I BAT = 20 % of I FQ
DISABLE
From Any
State
Pre-Charge
CHARGE or
NO_BATTERY States:
BAT output CC/CV
regulator operation
From Any
State Except
IPRGM Dynamic
Pinshort Detection
V BAT > V PreQ
Signal to Charger
State Machine
DISABLE &
STATIC_
PINSHORT
NTC_NoBatt
Initiate Soft-Start
V BAT < V PreQ
CC
Regulation
~(UVLO or POR or
(VIN < VOUT + δ ) or
NTC_Disable)
Clear and Hold Timer
STAT1 turned off
Output off
Indicate FAULT on STAT pins
NO
BATTERY
I BAT > I FQ
Constant Current
Regulation
I BAT = I FQ
Initiate Soft-Start
Suspend the Timer clock &
resume upon return to CHARGE
V BAT > V CV
Signal to Charger
State Machine
IPRGM
STATIC
PINSHORT
CHECK
NTC_ NoBatt
CV
Regulation
Constant Voltage
Regulation
V BAT = V CV
NTC FAULT
NTC Hot or Cold
IPRGM Static
Pinshort Detected
~IPRGM Static
Pinshort Detected
NTC OK-to- Charge
Timer Running (if Enabled )
STAT1 turned on
Initiate Soft-Start
Start Timer (if Enabled )
START
CHARGE
MONITOR
STAT1 turned on.
V BAT < V ReQ
NTC OK-to-Charge
Immediate
Timer Fault
Timer Fault Signal, from
Timer State Machine
RE-
V BAT > V ReQ
CHARGE
Initiate Soft-Start
Start Timer (if Enabled )
STAT1 remains off.
(Timer Disabled AND(I BAT < I TERM )) OR
(Timer Enabled AND Top-Off Timer Expired)
Transition
Comments
CHARGE
TIMER
FAULT
Signals to and from
Charger State Machine
State Comments
KEY:
Logical
State
State Exit Path
State
Transition
Condition
State Entry Path
Logical
State
23
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