NOT RECOMMENDED FOR NEW DESIGN
USE
AP3041
AP3039
BOOST CONTROLLER
Description
The AP3039 is a current mode high voltage low-side N-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 range of AP3039 is from 5V to 27V. Its operation
frequency is adjustable from 150kHz to 1MHz.
The AP3039 has UVLO (Under Voltage Lock Out) circuit. It uses two
external resistors to set the UVLO voltage. The AP3039 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,
when the output voltage drops to the OVP low threshold point, it will
enable the driver. It also features a soft start to reduce the inrush
current when power on, the soft start time can be set through an
external capacitor.
The AP3039 is available in QFN-3x3-16 and SOIC-14 packages.
Pin Assignments
(Top View)
Pin 1 Dot by
Marking
OV UVLO SS COMP
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
5
6
7
8
EN
VIN
NC
VCC
1
2
3
4
NC
FB
SHDN
AGND
EP
Exposed PAD
OUT PGND RT CS
QFN-3x3-16
(Top View)
1
14
13
12
11
10
9
8
Features
Input Voltage Range 5V to 27V
0.6A Peak MOSFET Gate Driver
20ns Quick MOSFET Gate Driver
Duty Cycle Limit of 90%
Programmable UVLO
Programmable Over Voltage Protection
Cycle by Cycle Current Limit
Adjustable Soft-Start
Adjustable Operation Frequency from 150kHz to 1MHz
2
3
4
5
6
7
SOIC-14
Applications
LED Lighting
Notebook
LCD Display Modules
AP3039
Document number: DS40922 Rev. 1 - 3
1 of 17
www.diodes.com
April 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AP3041
AP3039
Typical Applications Circuit
V
IN
: 6V to 27V
L
D1
R1
C
IN
VIN
UVLO
VCC
R2
C
V
Q1
R3
1W or 3W LED
OUT
CS
R
CS
R4
C
OUT
OFF ON
EN
RT
OV
ON OFF
R
T
C
SS
SS
SHDN
FB
COMP
R
C
C
C
GND
U1 AP3039
R5
V
IN
: 6V to 27V
L
D1
R1
C
IN
VIN
UVLO
VCC
R2
C
V
Q1
R3
OUT
CS
R
CS
R4
C
OUT
OFF ON
EN
RT
OV
ON OFF
R
T
C
SS
SS
SHDN
FB
COMP
R
C
C
C
GND
U1 AP3039
R5
AP3039
Document number: DS40922 Rev. 1 - 3
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April 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AP3041
AP3039
Typical Applications Circuit
(Cont.) (Note 1, 2 and 3)
Note 1:
The output voltage is decided by R5, R6 and the internal 0.5V reference. The output voltage accuracy is determined by the accuracy of R5 and R6, for which
the precise resistors are preferred.
V
OUT
=
0.5V *
R6
R5
R6
Note 2:
In this application, the LED current is controlled by the feedback resistor R5. LEDs current accuracy is determined by regulator’s feedback threshold
accuracy and is independent of the LEDs forward voltage variation. So the precise resistors are the better choices. The resistance of R5 is in inverse proportion to the
LED current since the feedback reference is fixed at 0.5V. The relation of R5 and the LED current can be expressed as below:
R5=
0.5V
I
LED
The summation of LED current is determined by R5 and internal 0.5V reference same as the illustration in Figure 22.
Note 3:
More detailed application information please refer to application note.
AP3039
Document number: DS40922 Rev. 1 - 3
3 of 17
www.diodes.com
April 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AP3041
AP3039
Pin Descriptions
Pin Number
16-pin
1
2
3, 12
14-pin
3
4
_
Pin Name
Function
EN
VIN
NC
Enable pin
Input supply pin, must be locally bypassed
No connection (for QFN-3x3-16 package only)
6V linear regulator output pin. VCC is used to bias the gate driver for the external MOSFET. If VIN is less than
8.5V, the VCC is equal to VIN minus drop voltage across bypass switch. If VIN is less than 6V, connect VCC to
VIN. This pin should be bypassed to GND (recommend to connect with AGND pin) with a ceramic capacitor
Connect this pin to the gate of external MOSFET, the gate driver has 0.6A peak current capability
Power ground
An external resistor connected from this pin to GND to set the operating frequency
Sense switch current pin, which is used for current mode control and for current limit
Reference ground
This pin can be connected to current matched chip and receives error signal used to shut down the system
Voltage Feedback Pin. The reference voltage is 500mV
Compensation Pin. This pin is the output of the internal Error Amplifier
An external soft start time capacitor is connected from this pin to ground and is charged by internal 12mA current
source to control regulator soft start time
Two resistors connected from this pin to ground and the VIN pin respectively to set start up and shutdown level
Over output voltage protection pin
Exposed backside pad. Solder to the circuit board ground plane with sufficient copper connection to ensure low
thermal resistance (for QFN-3x3-16 package only)
4
5
VCC
5
6
7
8
9
10
11
13
6
7
8
9
10
11
12
13
OUT
PGND
RT
CS
AGND
SHDN
FB
COMP
14
14
SS
15
16
1
2
UVLO
OV
_
_
EP
AP3039
Document number: DS40922 Rev. 1 - 3
4 of 17
www.diodes.com
April 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE
AP3041
AP3039
Functional Block Diagram
VIN
EN
UVLO
VCC
OUT
PGND
OV
CS
SHDN
COMP
FB
SS
RT
AGND
A (B)
A QFN-3x3-16
B SOIC-14
AP3039
Document number: DS40922 Rev. 1 - 3
5 of 17
www.diodes.com
April 2018
© Diodes Incorporated
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