Texas Instruments TPS61166-446 Evaluation Board TPS61166EVM-446 TPS61166EVM-446 TPS61166EVM-446 데이터 시트
제품 코드
TPS61166EVM-446
DEVICE INFORMATION
PIN ASSIGNMENTS
FB
VO
SW
OUT
PWM
NC
GND
VIN
EN
TOP VIEW
VBAT
Thermal
Pad
10-PIN 2.5mm x 2.5mm QFN
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SLVS991 – SEPTEMBER 2009
PIN FUNCTIONS
PIN
I/O
DESCRIPTION
NAME
NO.
VIN
2
I
IC Supply voltage input.
VO
10
O
Output of the boost converter. When the output voltage exceeds the over voltage protection (OVP) threshold,
the power switch turns off until VO drops below the over voltage protection hysteresis.
the power switch turns off until VO drops below the over voltage protection hysteresis.
OUT
8
O
Isolation switch is between this pin and the VO pin. Connect the anode of the LED to this pin.
GND
1
–
Ground of the IC.
VBAT
3
I
Battery supply voltage input. It can be tied with VIN pin when using a signal Li-ion battery.
EN
5
I
Enable pin (HIGH = enable). When the pin is pulled low for 1 ms, the IC turns off and consumes less than 1-
µ
A
current. For a 2-cell battery application, a logic high signal turns on the internal pre-regulator and enables the
IC. Therefore, do not connect the EN pin to the VIN pin in the
IC. Therefore, do not connect the EN pin to the VIN pin in the
application.
PWM
6
I
Control LED on/off. A PWM signal from 60 Hz to 40 kHz connects to the pin for LED brightness control.
FB
7
I
Cathode of the LED connects to this pin. Its voltage is regulated at 0.2 V. An external resistor connected to this
pin programs the LED current.
pin programs the LED current.
SW
9
I
Switching node of the IC where the PWM switching operates.
NC
4
–
No connect pin. Connect to ground is recommended, or can float.
Copyright © 2009, Texas Instruments Incorporated
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