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L6717TR Folha de dados(PDF) 3 Page - STMicroelectronics

Nome de Peças L6717TR
Descrição Electrónicos  High-efficiency hybrid AM2r2 controller with I2C interface and embedded drivers
PDF  56 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6717TR Folha de dados(HTML) 3 Page - STMicroelectronics

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L6717
Contents
Doc ID 17326 Rev 1
3/56
7
Output voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.1
CORE section - phase # programming . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2
CORE section - current reading and current sharing loop . . . . . . . . . . . . 35
7.3
CORE section - defining load-line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.4
CORE section - analog offset (Optional - I2CDIS = 3.3 V) . . . . . . . . . . . . 37
7.5
NB section - current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.6
NB section - defining load-line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.7
On-the-fly VID transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.8
Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.8.1
LS-Less Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8
Output voltage monitoring and protections . . . . . . . . . . . . . . . . . . . . . 41
8.1
Programmable overvoltage (I2DIS = 3.3 V) . . . . . . . . . . . . . . . . . . . . . . . 41
8.2
Feedback disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.3
PWRGOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.4
Overcurrent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.4.1
CORE section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.4.2
NB section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9
Main oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10
High current embedded drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1
Boot capacitor design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.2
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
11
System control loop compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11.1
Compensation network guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
12
LTB Technology® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13
Layout guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.1
Power components and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.2
Small signal components and connections . . . . . . . . . . . . . . . . . . . . . . . 53
14
VFQFPN48 mechanical data and package dimensions . . . . . . . . . . . . 54
15
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55



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