NCS29001 PDF даташит
Спецификация NCS29001 изготовлена «ON Semiconductor» и имеет функцию, называемую «LED Backlight Driver». |
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Детали детали
Номер произв | NCS29001 |
Описание | LED Backlight Driver |
Производители | ON Semiconductor |
логотип |
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NCS29001
LED Backlight Driver
The NCS29001 is an integrated LED driver used in LCD display
backlighting applications. A configurable bill of materials allows the
designer to create a highly ef ficient solution for a variety of LCD
screen sizes. The NCS29001 uses a boost type converter to deliver
constant current in a string of LEDs. High accuracy PWM dimming is
supported for a frequency up to 500 Hz . The integrated soft start
function provides excellent control during the power up sequence to
avoid current overshoot. The device protects against output
overvoltage, open / short LED, and thermal overload. The NCS29001
is offered in the cost effective SOIC−14 package.
Features
• 8.5 V to 18 V Input Voltage Range
• ±1% Vref Voltage Accuracy to set LED Current
• PWM Controlled Dimming
• Soft Start Limits In−Rush Current
• Open Feedback Protection
• Open LED Protection
• Short LED Protection
• LED String Cathode Short to ground Protection
• Max Duty Cycle Above 90%
• SOIC−14 Package
• This is a Pb−Free Device
Typical Application
• TFT−LCD TV Panels
• LCD Monitor Panels
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14
1
SOIC−14 NB
CASE 751A
MARKING
DIAGRAM
14
NCS29001G
AWLYWW
1
NCS29001= Specific Device Code
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
VIN 1
14 GATE
Vref 2
13 CS
GND 3
PWMin 4
NCS29001
12 PGND
11 PWMout
RT 5
10 FBN
FBP 6
9 COMP
STBY 7
8 OVP
ORDERING INFORMATION
See detailed ordering and shipping information on page 15 of
this data sheet.
© Semiconductor Components Industries, LLC, 2013
October, 2013 − Rev. 1
1
Publication Order Number:
NCS29001/D
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NCS29001
Figure 1. Block Diagram
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NCS29001
PINOUT ASSIGNMENT
VIN 1
14 GATE
Vref 2
GND
3
13 CS
12 PGND
PWMin
RT
FBP
STBY
4
NCS29001
11 PMWout
5 10 FBN
6 9 COMP
7 8 OVP
Figure 2. NSC29001 Pinout
PIN DESCRIPTION
Pin # Symbol
1 VIN
2 VREF
Type
Input
Output
3
GND
Ground
4
PWMin
Output
5 RT Output
6 FBP Input
7 STBY Input
8
OVP
Output
9
COMP
Power
10 FBN
Input
11
PWMout
Output
12
PGND
Ground
13 CS Power
14
GATE
Output
Description
VIN supply input. Small 1.0 mF low ESR bypass capacitor required from VIN to GND.
5 V / 10 mA reference voltage. Small 1.0 mF low ESR bypass capacitor required from VREF to
GND.
Analog ground.
PWM dimming control input.
The resistor connected between RT and GND sets the switching frequency
The reference voltage for the feedback (FBN). Reference level can be adjusted from 0.5 V up to
3.0 V using an external voltage divider.
The converter enters in standby mode when STBY is floating or pulled high. When STBY goes
from low to high the circuit will discharge the capacitors on the COMP pin and keep PWMout high
to discharge the output capacitor. STBY must remain high for 50 ms before the part enters
standby mode.
This pin provides the overvoltage protection for the converter. When the voltage at this pin
exceeds 1.2 V, the boost converter stops immediately and the device enters standby mode.
Loop compensation pin
Feedback pin and LED cathode connection. External resistor from FBN to GND sets the LED
current.
PWM dimming output driver.
Power ground.
This pin is used to sense the drain current of the external power MOSFET. It includes a built−in
blanking time.
This pin is the output GATE driver for an external N−channel power MOSFET
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NCS29001 | LED Backlight Driver | ON Semiconductor |
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