BCDSEMI AP3039

Preliminary Datasheet
BOOST CONTROLLER
AP3039
General Description
Features
AP3039 is a current mode high voltage low-side Nchannel 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 6V to 27V.
Its operation frequency is adjustable from 400K 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.
Input Voltage Range 6V 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 400 kHz to
1 MHz
Applications
·
·
Notebook
LCD Display Modules
AP3039 is available in QFN-3x3-16 package.
QFN-3x3-16
Figure 1. Package Type of AP3039
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
1
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Pin Configuration
FN Package
(QFN-3x3-16)
Pin 1 Identification
OV UVLO SS COMP
16
EN
1
VIN
2
NC
3
VCC
4
15
14
13
EP
5
6
7
8
12
NC
11
FB
10
SHDN
9
AGND
Exposed PAD
OUT PGND RT CS
Figure 2. Pin Configuration of AP3039 (Top View)
Pin Description
Pin Number
Pin Name
Function
1
EN
Enable pin
2
VIN
Input supply pin, must be locally bypassed
3, 12
NC
No connection
4
VCC
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. This
pin should be bypassed to GND (recommend to connect with AGND pin) with a ceramic
capacitor
5
OUT
Connect this pin to the gate of external MOSFET, the gate driver has 0.6A peak current capability
6
PGND
7
RT
An external resistor connected from this pin to GND to set the operating frequency
8
CS
Sense switch current pin, which is used for current mode control and for current limit
9
AGND
Reference ground
10
SHDN
This pin can be connected to current matched chip and receives error signal used to shut down
the system
11
FB
13
COMP
Power ground
Voltage Feedback Pin. The reference voltage is 500mV
Compensation Pin. This pin is the output of the internal Error Amplifier
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Pin Description (Continued)
Pin Number
Pin Name
Function
14
SS
An external soft start time capacitor is connected from this pin to ground and is charged by
internal 12μA current source to control regulator soft start time
15
UVLO
Two resistors connected from this pin to ground and the VIN pin respectively to set start up
and shutdown level
16
OV
Over output voltage protection pin
EP
Exposed backside pad. Solder to the circuit board ground plane with sufficient copper
connection to ensure low thermal resistance
Functional Block Diagram
REFERENCE
VIN
EN
UVLO
BYPASS
SWITCH
1.25V
2
1
15
R
22μA
CLK
VCC
3V
REFERENCE
EN
1.25V
OV
4
REGULATOR
5
DRIVER
Q
6
S
OUT
PGND
16
110mV
LOGIC
1.25V
8
22μA
CS
+
SHDN
LEB
10
SAW
+
Σ
COMP
13
OSTD
0.6V
EA
11
12μA
FB
SS
RT
7
OSL
14
CLK
9
AGND
SAW
Figure 3. Functional Block Diagram of AP3039
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Ordering Information
AP3039
-
Circuit Type
G1: Green
Package
TR: Tape and Reel
FN: QFN-3x3-16
Package
Temperature Range
Part Number
Marking ID
Packing Type
QFN-3x3-16
-40 to 85oC
AP3039FNTR-G1
B2A
Tape & Reel
BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
4
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Input Voltage
VIN
30
V
VCC Pin Voltage
VCC
10
V
OUT Pin Voltage
VOUT
10
V
VFB
7
V
VUVLO
7
V
VCS
7
V
SHDN Pin Voltage
VSHDN
7
V
Enable Pin Voltage
VEN
VIN
V
OV Pin Voltage
VOV
7
V
Thermal Resistance (Junction to Ambient, no Heat sink)
RθJA
60
oC/W
TJ
150
oC
TSTG
-65 to 150
TLEAD
260
oC
ESD (Machine Model)
200
V
ESD (Human Body Model)
2000
V
Feedback Pin Voltage
UVLO Pin Voltage
CS Pin Voltage
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
o
C
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.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Frequency
Operating Temperature
May 2008 Rev. 1. 0
Symbol
Min
Max
Unit
VIN
6
27
V
f
400
1000
kHz
TA
-40
85
o
C
BCD Semiconductor Manufacturing Limited
5
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Electrical Characteristics
(VIN=12V, VEN =VIN, TA=25oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
27
V
500
530
mV
35
100
nA
Input Voltage
VIN
6
Feedback Voltage
VFB
470
FB Pin Bias Current
IFB
Supply Current
ICC
Not Switching
3
5
mA
Shutdown Supply Current
IQ
VEN=0V
1
2
μA
6
6.5
VCC Voltage
VCC
VCC Current Limit
ICC-LIM
Drop Voltage Across Bypass Switch
VIN-VCC
Bypass Switch Turn-off Threshold
VBYP-HI
Bypass Switch Threshold Hysteresis
9V≤VIN≤27V
5.5
6V≤VIN<9V
5
V
50
mA
ICC=0mA, fOSC≤400kHz,
6V≤VIN <8.5V
300
mV
VIN increasing
8.7
V
VBYP-HYS VIN decreasing
260
mV
VCC Pin UVLO Rising Threshold
VCC-HI
4.7
V
VCC Pin UVLO Falling Hysteresis
VCC-HYS
300
mV
Oscillator Frequency
UVLO Threshold
fOSC
Adjustable, RT=51kΩ
to 150kΩ
400
1.22
VUVLO
1.25
1000
kHz
1.28
V
μA
UVLO Hysteresis Current Source
IHYS
Current Limit Threshold Voltage
VCS
90
110
130
mV
RT Voltage
VRT
1.20
1.25
1.30
V
Error Amplifier Transconductance
GS
22
μA/V
470
VEH
2.0
EN Pin Threshold Voltage
V
0.5
VEL
2.0
VIH
V
SHDN Pin Threshold Voltage
VIL
0.5
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
6
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Electrical Characteristics (Continued)
(VIN=12V, VEN =VIN, TA=25oC, unless otherwise specified.)
Parameter
OV Threshold
OV Hysteresis Current Source
Maximum Duty Cycle
Soft Start Current Source
Symbol
Conditions
Min
Typ
Max
Unit
VOV
1.25
V
IOV-HYS
22
μA
DMAX
90
ISS
12
μA
93
%
Out Pin Rise Time
tRISE
Out Pin Load =1nF
20
ns
Out Pin Fall Time
tFALL
Out Pin Load =1nF
20
ns
OUT Dropout Voltage (VCC-VOUT)
VOUT-H
IOUT=50mA
0.25
0.75
V
OUT Low Voltage Level (VOUT)
VOUT-L
IOUT=100mA
0.25
0.75
V
Thermal Shutdown Temperature
TOTSD
160
Thermal Shutdown Hysteresis
THYS
20
May 2008 Rev. 1. 0
o
C
oC
BCD Semiconductor Manufacturing Limited
7
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Typical Performance Characteristics
95
95
94
IOUT =160mA
IOUT = 200mA
93
94
92
92
Efficiency (%)
Efficiency (%)
fOSC =400kHz
fOSC= 1MHz
93
91
90
89
91
90
89
88
88
87
87
VIN=12V, VOUT=33V, fOSC=1MHz
L=22μH, CIN=10μF, COUT=10μF
86
85
-50
O
IOUT=160mA, VOUT=33V, TA=25 C
L=22μH, CIN=10μF; COUT=10μF
86
85
-25
0
25
50
75
100
6
125
9
12
15
18
21
24
27
Input Voltage (V)
o
Temperature ( C)
Figure 4. Efficiency vs. Case Temperature
Figure 5. Efficiency vs. Input Voltage
95
92.0
90
91.5
Efficiency (%)
Efficiency (%)
85
80
75
91.0
90.5
90.0
70
O
O
VIN=12V, VOUT=33V, fOSC=1MHz, TA=25 C
L=22μH, CIN=10μF, COUT=10μF
65
60
20
40
60
80
100
120
140
160
180
VIN=12V, VOUT=33V, fOSC=1MHz, TA=25 C
L=22μH, CIN=10μF, COUT=10μF
89.5
89.0
16
200
18
20
22
24
26
28
30
32
34
Output Voltage (V)
Output Current (mA)
Figure 6. Efficiency vs. Output Current
Figure 7. Efficiency vs. Output Voltage
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
8
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Typical Performance Characteristics (Continued)
2.0
6.5
1.8
6.4
1.6
6.3
1.4
6.2
VCC Voltage (V)
Supply Current (mA)
O
1.2
1.0
0.8
-50 C
O
25 C
O
85 C
O
125 C
0.4
0.2
6.1
6.0
5.9
5.8
O
0.6
-50 C
O
25 C
O
85 C
O
125 C
5.7
5.6
5.5
0.0
6
9
12
15
18
21
24
6
27
9
12
15
18
21
24
27
Input Voltage (V)
Input Voltage
Figure 8. Supply Current vs. Input Voltage
Figure 9. VCC Voltage vs. Input Voltage
1200
1.20
1100
1.15
Frequency (kHz)
Frequency (MHz)
1000
1.10
1.05
1.00
900
800
700
600
500
RT=51kΩ
0.95
0.90
-50
400
300
40
-25
0
25
50
75
100
125
60
80
100
120
140
160
180
RT (kΩ)
O
Case Temperature ( C)
Figure 10. Switching Frequency vs. Case Temperature
May 2008 Rev. 1. 0
Figure 11. Switching Frequency vs. RT Value
BCD Semiconductor Manufacturing Limited
9
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Typical Performance Characteristics (Continued)
1.30
1.260
1.29
1.255
1.28
UVLO Voltage (V)
RT Voltage (V)
1.27
1.26
1.25
1.24
O
-50 C
O
25 C
O
85 C
O
125 C
1.23
1.22
1.21
9
12
15
18
21
1.245
O
-50 C
O
25 C
O
85 C
O
125 C
1.240
1.235
1.20
6
1.250
24
1.230
27
6
9
12
Input Voltage (V)
Figure 12. RT Voltage vs. Input Voltage
18
21
24
27
Figure 13. UVLO Voltage vs. Input Voltage
1.280
25.0
O
-40 C
O
25 C
O
85 C
O
125 C
1.270
1.265
24.5
24.0
UVLO Current (μA)
1.275
OV Voltage (V)
15
Input Voltage (V)
1.260
1.255
1.250
1.245
23.5
23.0
22.5
22.0
21.5
1.240
21.0
1.235
20.5
1.230
6
9
12
15
18
21
24
O
-40 C
O
25 C
O
85 C
O
125 C
20.0
27
6
Input Voltage (V)
9
12
15
18
21
24
27
Input Voltage (V)
Figure 15. UVLO Current vs. Input Voltage
Figure 14. OV Voltage vs. Input Voltage
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
10
Preliminary Datasheet
BOOST CONTROLLER
AP3039
25.0
0.510
24.5
0.508
24.0
0.506
23.5
0.504
FB Voltage (V)
OV Current (μA)
Typical Performance Characteristics (Continued)
23.0
22.5
22.0
O
21.5
-50 C
O
25 C
O
85 C
O
125 C
21.0
20.5
9
12
15
18
21
24
0.500
0.498
0.496
0.494
0.492
20.0
6
0.502
0.490
-50
27
-25
0
Input Voltage (V)
25
50
75
100
125
O
Case Temperature ( C)
Figure 16. OV Current vs. Input Voltage
Figure 17. Feedback Voltage vs. Case Temperature
450
400
425
375
OUT Dropout Voltage (mV)
OUT Low Voltage (mV)
400
375
350
325
300
275
250
225
200
325
300
275
250
225
200
175
175
150
-50
350
-25
0
25
50
75
100
150
-50
125
O
-25
0
25
50
75
100
125
o
Temperature ( C)
Case Temperature ( C)
Figure 19. OUT Dropout Voltage vs. Case Temperature
Figure 18. OUT Low Voltage vs. Case Temperature
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
11
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Application Information
For Input Hysteresis Voltage
VIN-HYSTERESIS=22μA*R1
Operation
AP3039 is a boost DC-DC controller with adjustable
operation frequency. Current mode control scheme
provides excellent line and load regulation. Operation
can be best understood by referring to Figure 3.
At the start of each oscillator cycle, the SR latch is set
and external power switch Q1 (see Figure 4) turns on
and the switch current will increase linearly. The
voltage on external sense resistor RCS (see Figure4),
connected from CS pin to GND, is proportional to the
switch current. This voltage is added to a stabilizing
ramp and the result is fed into the non-inversion input
of the PWM comparator. When this non-inversion
input voltage exceeds inversion input voltage of PWM
comparator which is the output voltage of the error
amplifier EA, the SR latch is reset and the external
power switch turns off. The voltage level at inversion
input of PWM comparator sets the peak current level to
keep the output voltage in regulation. This voltage
level is the amplified signal of the voltage difference
between feedback voltage and reference voltage of
0.5V. So, a constant output current can be provided by
this operation mode.
Input Under-Voltage Detector
AP3039 contains an Under Voltage Lock Out (UVLO)
circuit. Two resistors R1 and R2 are connected from
UVLO pin to ground and VIN pin respectively (see
Figure 4). The resistor divider must be designed such
that the voltage on the UVLO pin is higher than 1.25V
when VIN is in the desired operating range. If the
voltage on the pin is below under voltage threshold, all
functions of AP3039 are disabled, but the system will
remain in a low power standby state. UVLO hysteresis
is accomplished through an internal 22μA current
source which switched on or off 22μA current into the
impedance of the set-point divider. When the UVLO
threshold is exceeded, the current source is activated to
instantly raise the voltage on the UVLO pin. When the
UVLO pin voltage falls below the threshold the current
source is turned off, causing the voltage on the UVLO
pin to fall. The formula for UVLO can be expresses as
blow:
For Input Threshold Voltage
VIN_THRESHOLD=1.25V*(R1+R2)/R2
May 2008 Rev. 1. 0
Over Voltage Protection
AP3039 has an over voltage protection (OVP) circuit.
The OV Pin is connected to the center tap of R3 and R4
resistor voltage-divider from the high voltage output to
GND. (see Figure 21). When the loop is open or the
output voltage becomes excessive in any case, result
the voltage on OV pin exceeds 1.25V, all functions of
AP3039 will be disabled, and the output voltage will
fall. OVP hysteresis is accomplished with an internal
22μA current source and the operation mode is the
same as UVLO. The formula for OVP can be expresses
as blow:
For OVP Voltage
VOVP=1.25V*(R3+R4)/R4
For OVP Hysteresis Voltage
VOVP-HYSTERESIS=22μA*R3
Frequency Selection
An external resistor RT, connected from RT pin to
GND, is used to set the operating frequency (see Figure
4). Operation frequency range is from 400kHz to
1MHz (see Table 1). High frequency operation
optimizes the regulator for the smallest component
size, while low frequency operation can reduce the
switch losses.
Table 1. Frequency Selection
Resistance of RT (kΩ)
Operating Frequency
(kHz)
147
400
95
600
68
800
51
1000
BCD Semiconductor Manufacturing Limited
12
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Application Information (Continued)
Soft Start
AP3039 has a soft start circuit to limit the inrush
current during startup. The time of soft start is
controlled by an internal 12μA current source and an
external soft start capacitor CSS connected from SS pin
to GND (see Figure 21). The effective CSS voltage for
Soft Start is from 0 to 2.3V, the time of Soft Start is:
tSS = CSS*2.3V/12μA
Typical Application
VIN : 6V to 27V
L
VOUT
D1
CIN
R1
COUT
VIN
R2
R3
UVLO
OUT
VCC
CS
CV
Q1
R5
RCS
R4
EN
OFF ON
RT
CSS
RC
RT
OV
SS
FB
OFF ON
SHDN
COMP
R6
GND
CC
U1 AP3039
Figure 21. AP3039 Application Circuit
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
13
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Typical Application (Continued)
VIN : 6V to 27V
CIN
L
COUT
D1
R3
R1
VIN
UVLO
CV
R2
Q1
OUT
CS
VCC
RCS
7 *10
R4
EN
OFF ON
RT
CSS
RC
RT
OV
SS
SHDN
COMP
CH 1
CH7
CH 8
EN
SHDN
U2 AP3608
FB
FB
GND
PWM
VCC
CC
CIN2
0.1μF
U1 AP3039
CH 2
ISET
AGND
PGND
SCE
SCL
OFF ON
PWM
Dimming
SDA
Digital
Dimming
AP3608
VCC=5.0V
External
C: X5R or X7R Dielectric
L: SUMIDA CDR6D28MN-220NC
Q1: FAIRCHILD FDC5612
D1: FAIRCHILD SS36
Figure 22. AP3039 + AP3608 (Eight Channels Current Sink) Application Circuit
Application Circuit Simple Introduction
Figure 22 is an application circuit in which the
AP3039 works with AP3608 to drive LED array. The
AP3608 acts as an eight-channel constant current sink
with current match to drive the LEDs.
When there is a shutdown signal on EN pin of AP3608
or all LED channels are inactive, the SHDN pin of
AP3608 outputs a low logic signal to turn off AP3039.
If AP3608 is on PWM dimming mode, the SHDN pin
of AP3608 outputs a signal to AP3039, which is
synchronous with PWM.
The SHDN pin and FB pin of AP3608 are the interface
terminals to coordinate with the AP3039. The FB pin
of AP3608 samples voltage of each channel, and
outputs the lowest voltage of all the strings to AP3039.
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
14
Preliminary Datasheet
BOOST CONTROLLER
AP3039
Mechanical Dimensions
Unit: mm(inch)
QFN-3x3-16
2.900(0.114)
3.100(0.122)
Pin 1
Identification
Pin 1
Identification
Pin1
0.350(0.014)
0.450(0.018)
0.180(0.007)
2.900(0.114)
3.100(0.122)
0.280(0.011)
0.450(0.018)
0.550(0.022)
Bottom View
Exposed
Pad
1.500(0.059)
Ref
1.500(0.059)
Ref
0.700(0.028)
0.900(0.035)
0.178(0.007)
0.228(0.009)
0.000(0.000)
0.050(0.002)
May 2008 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
15
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http://www.bcdsemi.com
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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
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E, 5F, Noble 7951
Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China
Taiwan
Fax:
+86-755-88267951
7865
Fax: +886-2-2656
28062808
Tel: +86-755-8826
Tel: +886-2-2656
Fax: +86-755-8826 7865
Fax: +886-2-2656 2806
USA Office
BCD Office
Semiconductor Corp.
USA
30920Semiconductor
Huntwood Ave.Corporation
Hayward,
BCD
CA 94544,
USA Ave. Hayward,
30920
Huntwood
Tel :94544,
+1-510-324-2988
CA
U.S.A
Fax:: +1-510-324-2988
+1-510-324-2788
Tel
Fax: +1-510-324-2788