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
•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
•LED Lighting
•LED TV
•LCD Display Modules
SOIC-16
Figure 1. Package Type of AP3041
Oct. 2012 Rev. 1. 2 |
BCD Semiconductor Manufacturing Limited |
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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 |
BCD Semiconductor Manufacturing Limited |
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Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041
Pin Description
Pin Number |
Pin Name |
Function |
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1 |
CT |
Capacitor setting shut down delay time |
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OV |
Over output voltage protection pin |
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3 |
UVLO |
Two resistors connected from this pin to GND and the power |
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supply respectively are used to set start-up and shutdown level |
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EN |
Enable pin |
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5 |
VIN |
Input supply pin. This pin must be locally bypassed |
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6 |
VCC |
This pin should be bypassed to GND with a ceramic capacitor |
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7 |
OUT |
Connect this pin to the gate of external MOSFET, the gate driver |
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has 1A peak current capability |
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8 |
GND |
Ground |
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This pin can be used to drive the external MOSFET. The logic of |
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the driver signal is controlled by that of PWM pin and the signal |
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9 |
FAULT |
phase of them is the same. This pin is pulled to ground under fault |
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condition of OVP, UVLO, OTP, diode short circuit and LED |
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short circuit. |
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10 |
RT |
An external resistor connected from this pin to GND is used to set |
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the operating frequency |
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11 |
CS |
Sense switch current pin, which is used for current mode control |
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and for current limit. The current limit voltage is 500mV |
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12 |
SC |
Slope compensation for current sense. A resistor between SC and |
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GND will program the slope compensation |
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An external soft-start time capacitor is placed from this pin to |
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GND and is charged by an internal 20μA current source to control |
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13 |
SS/COMP |
regulator soft-start time. |
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Compensation pin. This pin is the output of the internal error |
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amplifier. |
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14 |
FB |
Voltage feedback pin. The reference voltage is 500mV |
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15 |
PWM |
This pin can be connected to current matched chip and receives |
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error signal used to shut down the system |
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Fault condition output pin. When the output is in short circuit |
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16 |
FLAG |
condition, the FLAG outputs logic low to shut down the power |
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path. Please refer to the application circuit |
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Oct. 2012 Rev. 1. 2 |
BCD Semiconductor Manufacturing Limited |
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Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041
Functional Block Diagram
VIN |
5 |
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6 |
VCC |
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BANDGAP 1.25V |
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8 |
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GND |
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EN |
4 |
EN |
REFERENCE 3V |
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300mV |
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16 |
FLAG |
UVLO |
3 |
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10 A |
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R |
Q |
7 |
OUT |
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1.25V |
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CLK |
S |
DRIVE |
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8 |
GND |
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OV |
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OVP |
LOGIC |
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OCP |
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2.25V |
10 A |
LEB |
500mV11 |
CS |
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PWM |
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1.75V |
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PWM |
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SAW |
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FAULT |
9 |
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13 |
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FAULT |
OTSD |
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SS/COMP |
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CLK |
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EA |
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10 |
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FB |
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RT |
OSC |
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SAW |
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SCP |
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SC |
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1.25V |
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OVP |
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1 |
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300mV |
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CT |
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Figure 3. Functional Block Diagram of AP3041
Oct. 2012 Rev. 1. 2 |
BCD Semiconductor Manufacturing Limited |
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Data Sheet |
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Boost Controller for WLED Driver in Medium-sized LCD Panel |
AP3041 |
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Ordering Information |
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AP3041 |
- |
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Circuit Type |
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G1: Green |
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Package |
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Blank: Tube |
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M: SOIC-16 |
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TR: Tape & Reel |
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Package |
Temperature |
Part Number |
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Marking ID |
Packing |
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SOIC-16 |
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AP3041M-G1 |
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AP3041M-G1 |
Tube |
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-40 to 85°C |
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AP3041MTR-G1 |
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AP3041M-G1 |
Tape & Reel |
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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 |
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Symbol |
Value |
Unit |
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Input Voltage |
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VIN |
30 |
V |
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VCC Pin Voltage |
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VCC |
20 |
V |
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OUT Pin Voltage |
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VOUT |
20 |
V |
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FAULT Pin Voltage |
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VFAULT |
20 |
V |
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FB Pin Voltage |
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VFB |
20 |
V |
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UVLO Pin Voltage |
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VUVLO |
7 |
V |
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CS Pin Voltage |
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VCS |
20 |
V |
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SC Pin Voltage |
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VSC |
7 |
V |
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FLAG Pin Voltage |
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VFLAG |
7 |
V |
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SS/COMP Pin Voltage |
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VSS/COMP |
7 |
V |
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RT Pin Voltage |
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VRT |
7 |
V |
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PWM Pin Voltage |
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VPWM |
7 |
V |
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EN Pin Voltage |
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VEN |
30 |
V |
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OV Pin Voltage |
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VOV |
7 |
V |
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Thermal Resistance (Junction |
to |
θJA |
82 |
ºC/W |
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Ambient, No Heat Sink, Free Air) |
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Oct. 2012 Rev. 1. 2 |
BCD Semiconductor Manufacturing Limited |
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