Texas Instruments TPS61181(82/81A)-259 Evaluation Board TPS61181(82/81A)EVM-259 TPS61181AEVM-259 TPS61181AEVM-259 数据表
产品代码
TPS61181AEVM-259
IF
B
6
F
a
u
lt
PGND
IS
E
T
1
16
SW
2
VBAT
3
Vout
4
5
6
7
8
9
10
11
12
15
14
13
C
in
IF
B
1
IF
B
2
IFB 3
GND
DCTRL
IFB 4
TPS61181A
E
N
IF
B
5
SLVSAN6A
–
FEBRUARY 2011
–
REVISED MARCH 2011
PINOUT
PIN ASSIGNMENTS
PIN
I/O
DESCRIPTION
NO.
NAME
1
PGND
I
Power ground of the IC. Internally, it connects to the source of the PWM switch.
2
SW
I
This pin connects to the drain of the internal PWM switch, external Schottky diode and inductor.
3
V
BAT
I
This pin is connected to the battery supply. It provides the pull-up voltage for the Fault pin and battery
voltage signal. This is also the input to the internal LDO.
voltage signal. This is also the input to the internal LDO.
4
V
O
O
This pin monitors the output of the boost regulator. Connect this pin to the anode of the WLED strings.
5
ISET
I
The resistor on this pin programs the WLED output current.
6
Cin
I
Supply voltage of the IC. It is the output of the internal LDO. Connect 0.1
μ
F bypass capacitor to this pin.
7, 8, 9
IFB1-IFB3
I
Current sink regulation inputs. They are connected to the cathode of WLEDs. The PWM loop regulates
12, 13, 14
IFB4-IFB6
the lowest V
IFB
to 400 mV. Each channel is limited to 30 mA current.
10
GND
I
Signal ground of the IC.
11
DCTRL
I
Dimming control logic input. The dimming frequency range is 100 Hz to 1 kHz.
15
EN
I
The enable pin to the IC. A logic high signal turns on the internal LDO and enables the IC. Therefore, do
not connect the EN pin to the Cin pin.
not connect the EN pin to the Cin pin.
16
Fault
I
Gate driver output for an external PFET used for fault protection. It can also be used as signal output for
system fault report.
system fault report.
Copyright
©
2011, Texas Instruments Incorporated
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