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参数资料
| 型号： | TPS61500PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 5 A SWITCHING REGULATOR, 2640 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | GREEN, PLASTIC, HTSSOP-14 |
| 文件页数： | 17/21页 |
| 文件大小： | 725K |
| 代理商： | TPS61500PWPR |
DEVICE INFORMATION
PIN ASSIGNMENTS
1
2
3
4
5
6
7
14
13
12
11
10
9
8
SW
VIN
EN
SS
DIMC
AGND
PGND
OVP
FREQ
FB
COMP
TSSOP 14-PIN
(TOP VIEW)
www.ti.com ........................................................................................................................................................................................... SLVS893 – DECEMBER 2008
PIN FUNCTIONS
PIN
I/O
DESCRIPTION
NAME
NO.
VIN
3
I
The input pin to the IC. Connect VIN to a supply voltage between 2.9V and 18V. It is acceptable for the
voltage on the pin to be different from the boost power stage input for applications requiring voltage
beyond VIN range.
SW
1,2
I
This is the switching node of the IC. Connect SW to the switched side of the inductor.
FB
9
I
Feedback pin for positive voltage regulation. A resistor connects to this pin to program LED current.
EN
4
I
Enable pin. When the voltage of this pin falls below the enable threshold for more than 10ms, the IC
turns off. This pin is also used for PWM signal input for LED brightness dimming.
Comp
8
O
Output of the transconductance error amplifier. An external RC network is connected to this pin.
SS
5
O
Soft start programming pin. A capacitor between the SS pin and GND pin programs soft start timing. See
application section for information on how to size the SS capacitor
FREQ
10
O
Switch frequency program pin. An external resistor is connected to this pin. See application section for
information on how to size the FREQ resistor.
AGND
7
I
Signal ground of the IC
PGND
12–14
I
Power ground of the IC. It is connected to the source of the PWM switch.
OVP
11
I
Over voltage protection for LED driver. The voltage is 1.229. Using a resistor divider can program the
threshold of OVP.
DIMC
6
I
Analog and PWM dimming method option pin. A capacitor connected to the pin to set the time constant
of reference for analog dimming. Float this pin for PWM dimming.
Thermal Pad
The thermal pad should be soldered to the analog ground. If possible, use thermal via to connect to top
and internal ground plane layers for ideal power dissipation.
Copyright 2008, Texas Instruments Incorporated
5
Product Folder Link(s): TPS61500
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