LP3958 Datasheet, PDF (28/36 Pages) National Semiconductor (TI) – Lighting Management Unit with High Voltage Boost Converter

LP3958
SNVS423C – JANUARY 2006 – REVISED MARCH 2013
GPIO DATA (07H) – GPIO DATA REGISTER
D7
D6
D5
D4
R-0
R-0
R-0
R-0
D3
R-0
www.ti.com
D2
RW - 0
D1
DATA[2:0]
RW - 0
D0
RW - 0
DATA[2:0]
Bits 2-0
ENABLES (0BH) – ENABLES REGISTER
D7
D6
D5
NSTBY
EN_BOOST
R-0
RW - 0
RW - 0
GPIO data register bits
D4
R-0
D3
R-0
D2
EN_AUTOLOA
D
RW - 1
D1
R-0
D0
R-0
NSTBY
EN_BOOST
EN_AUTOLOAD
Bit 6
Bit 5
Bit 2
0 – LP3958 standby mode
1 – LP3958 active mode
0 – Boost converter disabled
1 – Boost converter enabled
0 – Boost active load disabled
1 – Boost active load enabled
BOOST OUTPUT (0DH) – BOOST OUTPUT VOLTAGE CONTROL REGISTER
D7
RW - 0
D6
RW - 0
D5
RW - 0
D4
D3
BOOST[7:0]
RW - 0
RW - 1
D2
RW - 0
D1
RW - 0
D0
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
R-0
D6
R-0
D5
R-0
D4
EN_EXT_K1_P
WM
RW - 0
D3
D2
EN_EXT_K2_P EN_EXT_K3_P
WM
WM
RW - 0
RW - 0
D1
EN_MAIN_PW
M
RW - 0
D0
EN_SUB_PWM
RW - 0
EN_EXT_K1_PWM
EN_EXT_K2_PWM
EN_EXT_K3_PWM
28
Submit Documentation Feedback
Bit 4
Bit 3
Bit 2
0 – External PWM control for KEY1 disabled
1 – External PWM control for KEY1 enabled
0 – External PWM control for KEY2 disabled
1 – External PWM control for KEY2 enabled
0 – External PWM control for KEY3 disabled
1 – External PWM control for KEY3 enabled
Product Folder Links: LP3958
Copyright © 2006–2013, Texas Instruments Incorporated