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LM3310 bảng dữ liệu(PDF) 2 Page - Texas Instruments

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tên linh kiện LM3310
Giải thích chi tiết về linh kiện  Step-Up PWM DC/DC Converter with Integrated Op-Amp and Gate Pulse Modulation Switch
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LM3310 bảng dữ liệu(HTML) 2 Page - Texas Instruments

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NC
VGHM
VFLK
VDPM
VDD
AVIN
SW
VIN
VC
13
14
18
17
16
15
1
2
3
4
5
6
NC
SS
FREQ
LM3310
LM3310
SNVS341E – AUGUST 2005 – REVISED MAY 2013
www.ti.com
Connection Diagram
Top View
Figure 1. WQFN-24 Package
See Package Number RTW0024A
θJA=37°C/W
Pin Descriptions
Pin
Name
Function
1
NC
Not internally connected. Leave pin open.
2
VGHM
Output of GPM circuit. This output directly drives the supply for the gate driver circuits.
3
VFLK
Determines when the TFT LCD is on or off. This is controlled by the timing controller in the LCD
module.
4
VDPM
VDPM pin is the enable signal for the GPM block. Pulling this pin high enables the GPM while
pulling this pin low disables it. VDPM is used for timing sequence control.
5
VDD
Reference input for gate pulse modulation (GPM) circuit. The voltage at VDD is used to set the lower
VGHM voltage. If the GPM function is not used connect VDD to VIN.
6
AVIN
Op-Amp analog power input.
7
OUT
Output of the Op-Amp.
8
NEG
Negative input terminal of the Op-Amp.
9
POS
Positive input terminal of the Op-Amp.
10
AGND
Analog ground for the step-up regulator, LDO, and Op-Amp. Connect directly to DAP and PGND
beneath the device.
11
NC
Not internally connected. Leave pin open.
12
NC
Not internally connected. Leave pin open.
13
NC
Not internally connected. Leave pin open.
14
SS
Boost converter soft start pin.
15
VC
Boost compensation network connection. Connected to the output of the voltage error amplifier.
16
FREQ
Switching frequency select input. Connect this pin to VIN for 1.28MHz operation and AGND for
660kHz operation.
17
VIN
Boost converter and GPM power input.
18
SW
Boost power switch input. Switch connected between SW pin and PGND pin.
19
SHDN
Shutdown pin. Active low, pulling this pin low disable the LM3310.
20
FB
Boost output voltage feedback input.
21
PGND
Power Ground. Source connection of the step-up regulator NMOS switch and ground for the GPM
circuit. Connect AGND and PGND directly to the DAP beneath the device.
2
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Copyright © 2005–2013, Texas Instruments Incorporated
Product Folder Links: LM3310



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