Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
General Description
The AP3041 is a current mode high voltage low-side
channel MOSFET controller, which is ideal for boost
regulators. It contains all the features needed to
implement single-ended primary topology DC/DC
converters.
The input voltage of AP3041 ranges from 5V to 27V.
Its operation frequency is adjustable from 100kHz to
1MHz.
The AP3041 has UVLO (Under Voltage Lock Out)
circuit. It uses two external resistors to set the UVLO
voltage. The AP3041 also has an over output voltage
protection to limit the output voltage. The OVP
voltage can be set through external resistors. If the
output voltage is higher than the OVP high threshold
point, it will disable the driver and the system is
latched up. The output short circuit protection as well
as LED low side short to ground detection function
can be applied in system.
The AP3041 has other protection functions, such as
LED short protection, LED high side short to ground
protection, diode short protection, over current
protection, over temperature protection and so on.
The AP3041 is available in SOIC-16 package.
Features
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Input Voltage Range: 5V to 27V
1A Peak and 10V MOSFET Gate Driver
20ns Quick MOSFET Gate Driver
Duty Cycle Limit of 90%
Programmable UVLO
PWM Dimming Control
Programmable Over Voltage Protection
LED Open Protection
LED Short Circuit Protection
Diode Short Circuit Protection
Output Short Circuit Protection
LED Low-side Short to Ground Detection
OV Pin Under Voltage Protection
Over Current Protection
Programmable Slope Compensation
Adjustable Soft-start
Adjustable Protection Delay
Fault Status Indication
Adjustable Operation Frequency from 100kHz to
1MHz
Over Temperature Protection
Applications
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LED Lighting
LED TV
LCD Display Modules
SOIC-16
Figure 1. Package Type of AP3041
Oct. 2012
Rev. 1. 2
1
BCD Semiconductor Manufacturing Limited
Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Pin Configuration
M Package
(SOIC-16)
Figure 2. Pin Configuration of AP3041 (Top View)
Oct. 2012
Rev. 1. 2
2
BCD Semiconductor Manufacturing Limited
Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
CT
OV
UVLO
EN
VIN
VCC
OUT
GND
Function
Capacitor setting shut down delay time
Over output voltage protection pin
Two resistors connected from this pin to GND and the power
supply respectively are used to set start-up and shutdown level
Enable pin
Input supply pin. This pin must be locally bypassed
This pin should be bypassed to GND with a ceramic capacitor
Connect this pin to the gate of external MOSFET, the gate driver
has 1A peak current capability
Ground
This pin can be used to drive the external MOSFET. The logic of
the driver signal is controlled by that of
PWM
pin and the signal
phase of them is the same. This pin is pulled to ground under fault
condition of OVP, UVLO, OTP, diode short circuit and LED
short circuit.
An external resistor connected from this pin to GND is used to set
the operating frequency
Sense switch current pin, which is used for current mode control
and for current limit. The current limit voltage is 500mV
Slope compensation for current sense. A resistor between SC and
GND will program the slope compensation
An external soft-start time capacitor is placed from this pin to
GND and is charged by an internal 20μA current source to control
regulator soft-start time.
Compensation pin. This pin is the output of the internal error
amplifier.
Voltage feedback pin. The reference voltage is 500mV
This pin can be connected to current matched chip and receives
error signal used to shut down the system
Fault condition output pin. When the output is in short circuit
condition, the FLAG outputs logic low to shut down the power
path. Please refer to the application circuit
9
FAULT
10
11
12
RT
CS
SC
13
SS/COMP
14
15
16
FB
PWM
FLAG
Oct. 2012
Rev. 1. 2
3
BCD Semiconductor Manufacturing Limited
Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Functional Block Diagram
VIN
5
6
VCC
BANDGAP
1.25V
8
GND
EN
4
EN
REFERENCE
3V
16
UVLO
OV
3
1.25V
2
2.25V
15
300mV
10 A
CLK
OVP
10 A
R
S
Q
7
DRIVE
8
500mV 11
FLAG
OUT
GND
CS
LOGIC
LEB
OCP
PWM
1.75V
SAW
9
FAULT
OTSD
CLK
EA
SCP
1.25V
OVP
1
300mV
14
PWM
13
FAULT
SS/COMP
FB
RT
SC
10
12
OSC
SAW
CT
Figure 3. Functional Block Diagram of AP3041
Oct. 2012
Rev. 1. 2
4
BCD Semiconductor Manufacturing Limited
Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Ordering Information
AP3041
-
Circuit Type
Package
M: SOIC-16
G1: Green
Blank: Tube
TR: Tape & Reel
Package
SOIC-16
Temperature
Range
-40 to 85°C
Part Number
AP3041M-G1
AP3041MTR-G1
Marking ID
AP3041M-G1
AP3041M-G1
Packing
Type
Tube
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
VCC Pin Voltage
OUT Pin Voltage
FAULT
Pin Voltage
FB Pin Voltage
UVLO Pin Voltage
CS Pin Voltage
SC Pin Voltage
FLAG Pin Voltage
SS/COMP Pin Voltage
RT Pin Voltage
PWM
Pin Voltage
EN Pin Voltage
OV Pin Voltage
Thermal Resistance (Junction to
Ambient, No Heat Sink, Free Air)
Symbol
V
IN
V
CC
V
OUT
V
FAULT
V
FB
V
UVLO
V
CS
V
SC
V
FLAG
V
SS/COMP
V
RT
V
PWM
V
EN
V
OV
θ
JA
Value
30
20
20
20
20
7
20
7
7
7
7
7
30
7
82
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ºC/W
Oct. 2012
Rev. 1. 2
5
BCD Semiconductor Manufacturing Limited
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