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STCF07 데이터시트(PDF) 2 Page - STMicroelectronics

부품명 STCF07
상세설명  High power buck-boost white LED driver
Download  26 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCF07 데이터시트(HTML) 2 Page - STMicroelectronics

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Contents
STCF07
2/26
Doc ID 16757 Rev 3
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7
Logic pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1
CSEL pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2
FAULT pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3
ENABLE pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8
Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1
Buck-boost converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.2
High current mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.3
Low current mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.4
Shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.5
Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.6
STCF07 protection features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.6.1
Peak current and short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . 13
8.6.2
Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.6.3
Thermal shutdown protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.6.4
Sensing of LED temperature with the NTC resistor . . . . . . . . . . . . . . . . 13
8.6.5
Undervoltage lockout function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9
PCB design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9.1
PCB design rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9.2
PCB design of the demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . 16
9.3
Schematic of the demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . 18


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