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LP3958TL Datasheet(PDF) 27 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LP3958TL
Description  Lighting Management Unit with High Voltage Boost Converter
PDF  28 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3958TL Datasheet(HTML) 27 Page - National Semiconductor (TI)

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LP3958 Register Bit Explanations (Continued)
ENABLES (0BH) – ENABLES REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
NSTBY
EN_BOOST
EN_AUTOLOAD
R-0
RW-0
RW-0
R-0
R-0
RW-1
R-0
R-0
NSTBY
Bit 6
0 – LP3958 standby mode
1 – LP3958 active mode
EN_BOOST
Bit 5
0 – Boost converter disabled
1 – Boost converter enabled
EN_AUTOLOAD
Bit 2
0 – Boost active load disabled
1 – Boost active load enabled
BOOST OUTPUT (0DH) – BOOST OUTPUT VOLTAGE CONTROL REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
BOOST[7:0]
RW-0
RW-0
RW-0
RW-0
RW-1
RW-0
RW-0
RW-0
BOOST output voltage adjustment
BOOST[7:0]
Typical boost output voltage (V)
0000 1000
8.00
0000 1001
9.00
0000 1010
10.00
0000 1011
11.00
0000 1100
12.00
0000 1101
13.00
0000 1110
14.00
0000 1111
15.00
0001 0000
16.00
0001 0001
17.00
0001 0010
18.00
PWM ENABLE (2BH) – EXTERNAL PWM CONTROL REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
EN_EXT_K1_PWM
EN_EXT_K2_PWM
EN_EXT_K3_PWM
EN_MAIN_PWM
EN_SUB_PWM
R-0
R-0
R-0
RW-0
RW-0
RW-0
RW-0
RW-0
EN_EXT_K1_PWM
Bit 4
0 – External PWM control for KEY1 disabled
1 – External PWM control for KEY1 enabled
EN_EXT_K2_PWM
Bit 3
0 – External PWM control for KEY2 disabled
1 – External PWM control for KEY2 enabled
EN_EXT_K3_PWM
Bit 2
0 – External PWM control for KEY3 disabled
1 – External PWM control for KEY3 enabled
EN_EXT_MAIN_PWM
Bit 1
0 – External PWM control for MAIN disabled
1 – External PWM control for MAIN enabled
EN_EXT_SUB_PWM
Bit 0
0 – External PWM control for SUB disabled
1 – External PWM control for SUB enabled
www.national.com
27



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