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STCF04 Datenblatt(PDF) 29 Page - STMicroelectronics

Teilenummer STCF04
Bauteilbeschribung  High power white LED SuperCap™ driver with I²C interface
PDF  43 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCF04 Datenblatt(HTML) 29 Page - STMicroelectronics

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STCF04
Theory of operation
Doc ID 022927 Rev 3
29/43
10
Theory of operation
10.1
The state machine diagram
The state machine diagram of the device describes the overall function of the logic part of
the device. It helps with the understanding of all the working modes of the complex and
efficient management of the stored energy.
Figure 13.
State machine diagram of the STCF04
!PWR_ON & MONTR
Battery plug-in
IDLE
Flash
+
CHRG
+ NTC
Torch
+
CHRG
+ NTC
CHRG
Aux
LED
On
NTC
CHRG
|| FLASH_ON
|| TCH_ON
NTC
FLASH_ON
&READY &
LS
TCH_ON
& READY
&TCHV_H
MaxTimeFlash
!TCH_ON
MaxTimeLed
!NTC & PWR_ON
!CHRG
|| (READY
&!FLASH_ON &
!TCH_ON)
AuxLed_ON
LOCK
ALARM
From any states
Status_Register
read
Shutdown
PWR_ON
!PWR_ON || !RESET
From any states
Monitoring
!PWR_ON & NTC
!PWR_ON || !MONTR
!PWR_ON & !NTC
Flash
+
CHRG
+ NTC
+ LS
FLASH_ON
& READY
Torch
eff.
+
CHRG
+ NTC
TCH_ON
&READY
&!TCHV_H
PWR_ON = Power ON
MONTR = Monitoring ON
LS_ON = Light Sensor ON
CHRG = Charging ON
FLASH_ON = bit Flash_ON & pin Flash ON
TCH_ON = bit TCH_ON & pin Torch ON
AuxLED_ON = Auxiliary led ON
READY = Ready Pin
AM11887v1



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