Diodes AP3041 User Manual

Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041

Data Sheet

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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p

f

Data Sheet

Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041

Pin Description

Pin Number Pin Name Function

1 CT Capacitor setting shut down delay time

2 OV Over output voltage protection pin

3 UVLO

4 EN Enable pin

5 VIN Input supply pin. This pin must be locally bypassed

6 VCC This pin should be bypassed to GND with a ceramic capacitor

Two resistors connected from this pin to GND and the
supply respectively are used to set start-up and shutdown level

ower

7 OUT

8 GND Ground

9 FAULT

10 RT

11 CS

12 SC

13 SS/COMP

14 FB Voltage feedback pin. The reference voltage is 500mV

15 PWM

16 FLAG

Connect this pin to the gate of external MOSFET, the gate driver
has 1A peak current capability

This pin can be used to drive the external MOSFET. The logic o
the driver signal is controlled by that of
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.

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

PWM pin and the signal

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

15

10

12

5

OSC

1.25V

10

OVP

10

OTSD

A

A

CLK

SAW

3V

LOGIC

1

PWM

CLK

OVP

LEB

SCP

R
S

EA

Q

OCP

1.75V

SAW

500mV

1.25V

300mV

16

7

DRIVE

8

11

13

14

BANDGAP

4

3

2

9

EN REFERENCE

300mV

1.25V

2.25V

FAULT

VIN VCC

EN

UVLO

OV

PWM

FAULT

RT
SC

6

8

GND

FLAG
OUT

GND
CS

SS/COMP

FB

CT

Figure 3. Functional Block Diagram of AP3041

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Data Sheet

Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041

Ordering Information

AP3041 -

Circuit Type G1: Green

Package

Package
M: SOIC-16

Temperature

Range

Part Number Marking ID

Blank: Tube
TR: Tape & Reel

Packing

Type

AP3041M-G1 AP3041M-G1 Tube

SOIC-16

-40 to 85°C
AP3041MTR-G1 AP3041M-G1 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 Symbol Value Unit

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 Volt a ge

PWM Pin Voltage

EN Pin Voltage

OV Pin Voltage

Thermal Resistance (Junction to
Ambient, No Heat Sink, Free Air)

V

V

V

V

FAULT

V

V

UVLO

V

V

V

FLAG

V

SS/COMP

V

V

V

V

θJA

IN

CC

OUT

FB

CS

SC

RT

PWM

EN

OV

30 V

20 V

20 V

20 V

20 V

7 V

20 V

7 V

7 V

7 V

7 V

7 V

30 V

7 V

82 ºC/W

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Data Sheet

Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041

Absolute Maximum Ratings (Note 1, Continued)

Parameter Symbol Value Unit

Operating Junction Temperature

Storage Temperature

Lead Temperature (Soldering, 10 sec)

T

T

T

J

STG

LEAD

ESD (Human Body Model) 2000 V

ESD (Machine Model) 200 V

Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.

150 ºC

-65 to 150 ºC

260 ºC

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage VIN 5 27 V

Operating Frequency f 0.1 1 MHz

Operating Temperature Range TJ -40 85 ºC

Electrical Characteristics

VCC=12V, VEN=3.3V, TA=25ºC, unless otherwise specified.

Parameter Symbol Conditions Min Typ Max Unit

Input Voltage VIN 5 27 V

Feedback Voltage VFB 490 500 510 mV

Supply Current ICC VFB=VIN, no switching 1.5 5 mA

Shutdown Supply Current IQ V

VCC Voltage

VCC Current Limit I

VCC Pin UVLO Rising Threshold V

VCC Pin UVLO Falling
Hysteresis

Oscillator Frequency f

SC Peak Voltage V

UVLO Threshold V

UVLO Hysteresis Current Source I

V

CC

35 mA

CC-LIM

4.7 V

CC-HI

300 mV

V

CC-HYS

0.1 1 MHz

OSC

530 680 mV

SC_PK

1.20 1.25 1.30 V

UVLO

UVLO-HYS

10

=0 1 2

EN

11V≤V

5V≤VIN≤10V, ICC=5mA VIN-0.5 V

≤27V 9.5 10.0 10.5 V

IN

μA

μA

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Data Sheet

Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041

Electrical Characteristics (Continued)

VCC=12V, VEN=3.3V, T

Parameter Symbol Conditions Min Typ Max Unit

Current Limit Threshold Voltage VCS 0.48 0.5 0.52 V

RT Voltage VRT 1.20 1.25 1.30 V

Error Amplifier Voltage Gain GV 680 V /V

Error Amplifier Transconductance GS 500

EN Pin Threshold Voltage

PWM Pin Threshold Voltage

OV Threshold VOV 2.25 V

OV Hysteresis Current Source I

LED- Short to GND Detection Level V

LED+ Short to LED-Detection Level V

LED+ Short to GND Detection Level V

Diode Short Detection Level V

CT Current Source ICT 5

CT Threshold Voltage VCT 2.6 V

Maximum Duty Cycle D

Soft-start Current Source ISS 16 22 28

OUT Pin Rising Time t

OUT Pin Falling Time t

OUT High Voltage Level (VCC-V

OUT Low Voltage Level (V

FAULT Pin Rising Time t

FAULT Pin Falling Time t

FAULT High Voltage Level
(V

CC-VFAU LT

FAULT Low Voltage Level

FAULT Minimum Pulse Width tD

FLAG High Voltage Level V

FLAG Low Voltage Level V

Thermal Shutdown Temperature T

Thermal Shutdown Hysteresis T

)

=25ºC, unless otherwise specified.

A

VEH 2.5

VEL 0.5

VIH 2.5

VIL 0.5

10

OV-HYS

0.3 V

FB_LOW

1.25 V

FB_HIGH

0.3 V

OV_LOW

1.75 V

CS_HIGH

f=200kHz 80 90 %

MAX

C

RISE

C

FAL L

) V

OUT

) V

OUT

V

FAU LT_H

V

FAU LT_ L

OUT-H

OUT-L

RISE

FAL L

I

OUT

I

OUT

C

C

I

FAU LT

I

FAU LT

Oscillator
Frequency=200kHz

FLAG-H

FLAG-L

OTSD

HYS

I

FLAG

I

FLAG

160 ºC

20 ºC

μA /V

V

V

μA

μA

μA

=1nF 20

OUT

=1nF 20

OUT

=50mA 0.25 0.75

=50mA 0.25 0.75

=1nF 100

FAU LT

=1nF 100

FAU LT

=10mA 0.25 0.75

=10mA 0.25 0.75

20

=500μA

=500μA

2

0.25 0.75

ns

V

V

ns

V

V

μs

V

V

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Data Sheet

Boost Controller for WLED Driver in Medium-sized LCD Panel AP3041

Typical Performance Characteristics

140

120

100

80

60

40

LED Current (mA)

20

0

0 20406080100

PWM Duty (%)

VIN=12V, V

f
f
f
f
f

PWM

PWM

PWM

PWM

PWM

=5V

PWM

=70Hz
=200Hz
=500Hz
=1kHz
=2kHz

1000

900
800
700
600
500
400
300

Frequency (kHz)

200
100

0

0 40 80 120 160 200 240 280 320

RT (kΩ)

VIN=12V

Figure 4. LED Current vs. PWM Duty Figure 5. Frequency vs. R

T

0.54

0.52

0.50

(V)

FB

V

0.48

0.46

-50 -25 0 25 50 75 100 125 150

Temperature (oC)

VIN=12V

2.2

2.0

1.8

1.6

1.4

1.2

Supply Current (mA)

1.0

0.8

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V
VIN=24V

Figure 6. V

vs. Temperature Figure 7. Supply Current vs. Temperature

FB

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

Typical Performance Characteristics (Continued)

3.0

V

=0V

PWM

2.5

2.0

VIN=12V
VIN=24V

1.5

1.0

Shutdown Current (μA)

0.5

0.0

-40 0 40 80 120 160

Temperature (OC)

400

380

360

340

Frequency (kHz)

320

RT=82k

300

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

Figure 8. Supply Current vs. Temperature Figure 9. Frequency vs. Temperature

14

12

10

8

(V)

CC

6

V

4

2

0

5 1015202530

Input Voltage (V)

TA=25OC

0.8

0.7

0.6

0.5

0.4

CS Threshold (V)

0.3

0.2

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V

Figure 10. VCC vs. Input Voltage F igure 11. CS Threshold vs. Temperature

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

Typical Performance Characteristics (Continued)

2.0

2.0

1.8

1.6

1.4

1.8

1.6

1.4

EN Threshold Voltage (V)

1.2

1.0

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V

Rising
Falling

Figure 12. EN Threshold Voltage vs. Temperature Figure 1 3. PW M Threshold Voltage vs. Temperature

1.2

PWM Threshold Voltage (V)

1.0

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

Rising
Falling

2.50

2.45

2.40

2.35

2.30

2.25

2.20

OV Thershold Voltage (V)

2.15

2.10

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V

0.36

0.34

0.32

0.30

0.28

FB Low Threshold Voltage (V)

0.26

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V

Figure 14. OV Threshold Voltage vs. Temperature Figure 15. FB Low Threshold Voltage vs. Temperature

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

Typical Performance Characteristics (Continued)

1.350

0.40

1.325

1.300

1.275

1.250

1.225

0.36

0.32

0.28

1.200

FB High Threshold Voltage (V)

1.175

1.150

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V

0.24

OV Low Threshold Voltage (V)

0.20

-75 -50 -25 0 25 50 75 100 125 150

Temperature (OC)

VIN=12V

Figure 16. FB High Threshold Voltage vs. Temperature Figure 17. OV Low Threshold Voltage vs. Temperature

36

32

28

24

20

Soft-start Current (μA)

16

-40 0 40 80 120 160

Temperature (OC)

VIN=12V
VIN=24V

6.8

6.4

6.0

5.6

5.2

4.8

CT Charge Current (μA)

4.4

4.0

-40 0 40 80 120 160

VIN=12V
VIN=24V

Temperature (OC)

Figure 18. Soft-start Current vs. Temperature Figure 19.CT Charge Current vs. Temperature

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

Typical Application

Figure 20. Typical Application Circuit 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

Mechanical Dimensions

SOIC-16 Unit: mm(inch)

1.350(0.053)

1.750(0.069)

0.330(0.013)

0.510(0.020)

B

7

°

1.250(0.049)

1.650(0.065)

5

2

.

0

0

7

°

0

.

0

(

A

20:1

)

0

1

0.400(0.016)

1.270(0.050)

3°

7°

8

°

5.800(0.228)

6.240(0.246)

3.800(0.150)

4.040(0.159)

9

.

5

°

8

°

0.400(0.016)×45°

8°

0°
8°

R0.200(0.008)

R0.200(0.008)

.

0

0

0

5

2

.

0

B

20:1

C

φ

S 1.000(0.039)

Depth 0.200(0.008)

A

C

2

0

0
0

.

0

(

0

1

0.200(0.008)

)
)

.

0

(

0

5

0

.

0

C-C
50:1

2
2

.

0

0

.

0

(

0

0

0

5

)

8

0

(

)

0

1

0

.

Note: Eject hole, oriented hole and mold mark is optional.

Oct. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

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BCD Semiconductor Manufacturing Limited

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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

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