Download Data Sheet General Description

Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
General Description
Features
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.
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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.
AP3041
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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The AP3041 is available in SOIC-16 package.
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
1
2
CT
OV
3
UVLO
4
5
EN
VIN
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
6
VCC
This pin should be bypassed to GND with a ceramic capacitor
7
OUT
8
GND
9
FAULT
10
RT
11
CS
12
SC
13
SS/COMP
14
FB
15
PWM
16
FLAG
Oct. 2012
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
Rev. 1. 2
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Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Functional Block Diagram
VIN
6
5
BANDGAP
1.25V
8
EN
4
EN
REFERENCE
16
UVLO
10 A
1.25V
OV
CLK
2
OVP
2.25V
GND
3V
300mV
3
VCC
R
S
LOGIC
7
DRIVE
8
Q
OCP
LEB
10 A
500mV 11
FLAG
OUT
GND
CS
15
PWM
1.75V
SAW
PWM
9
FAULT
13
FAULT
10
RT
SC
12
OTSD
CLK
EA
SAW
SCP
SS/COMP
14
FB
OSC
1.25V
OVP
1
300mV
CT
Figure 3. Functional Block Diagram 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
Ordering Information
AP3041
-
Circuit Type
G1: Green
Package
M: SOIC-16
Blank: Tube
TR: Tape & Reel
Package
Temperature
Range
SOIC-16
-40 to 85°C
Part Number
Marking ID
Packing
Type
AP3041M-G1
AP3041M-G1
Tube
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
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)
Oct. 2012
Symbol
Value
Unit
VIN
VCC
VOUT
VFAULT
VFB
VUVLO
VCS
VSC
VFLAG
VSS/COMP
VRT
VPWM
VEN
VOV
30
20
20
20
20
7
20
7
7
7
7
7
30
7
V
V
V
V
V
V
V
V
V
V
V
V
V
V
θJA
82
Rev. 1. 2
ºC/W
BCD Semiconductor Manufacturing Limited
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Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Absolute Maximum Ratings (Note 1, Continued)
Parameter
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
ESD (Human Body Model)
ESD (Machine Model)
Symbol
Value
Unit
TJ
TSTG
TLEAD
150
-65 to 150
260
2000
200
ºC
ºC
ºC
V
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.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Frequency
Operating Temperature Range
Symbol
Min
Max
Unit
VIN
f
TJ
5
0.1
-40
27
1
85
V
MHz
ºC
Electrical Characteristics
VCC=12V, VEN=3.3V, TA=25ºC, unless otherwise specified.
Parameter
Symbol
Input Voltage
VIN
Feedback Voltage
VFB
Supply Current
ICC
VFB=VIN, no switching
Shutdown Supply Current
IQ
VEN=0
VCC Voltage
VCC
Conditions
Min
Typ
5
490
11V≤VIN≤27V
5V≤VIN≤10V, ICC=5mA
9.5
Max
Unit
27
V
500
510
mV
1.5
5
mA
1
2
μA
10.0
10.5
V
VIN-0.5
V
VCC Current Limit
ICC-LIM
35
mA
VCC Pin UVLO Rising Threshold
VCC-HI
4.7
V
VCC-HYS
300
mV
VCC Pin UVLO Falling
Hysteresis
Oscillator Frequency
fOSC
0.1
1
MHz
SC Peak Voltage
VSC_PK
530
680
mV
UVLO Threshold
VUVLO
1.20
1.30
V
UVLO Hysteresis Current Source
Oct. 2012
IUVLO-HYS
1.25
10
Rev. 1. 2
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, TA=25ºC, unless otherwise specified.
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
μA /V
EN Pin Threshold Voltage
PWM Pin Threshold Voltage
OV Threshold
2.5
VEH
VEL
V
0.5
VIH
2.5
VIL
V
0.5
VOV
2.25
V
OV Hysteresis Current Source
IOV-HYS
10
μA
LED- Short to GND Detection Level
VFB_LOW
0.3
V
LED+ Short to LED-Detection Level
VFB_HIGH
1.25
V
LED+ Short to GND Detection Level
VOV_LOW
0.3
V
Diode Short Detection Level
VCS_HIGH
1.75
V
CT Current Source
ICT
5
μA
CT Threshold Voltage
VCT
2.6
V
Maximum Duty Cycle
DMAX
90
%
Soft-start Current Source
f=200kHz
80
ISS
16
22
OUT Pin Rising Time
tRISE
COUT=1nF
20
OUT Pin Falling Time
tFALL
COUT =1nF
20
28
μA
ns
OUT High Voltage Level (VCC-VOUT)
VOUT-H
IOUT=50mA
0.25
0.75
V
OUT Low Voltage Level (VOUT)
VOUT-L
IOUT=50mA
0.25
0.75
V
FAULT Pin Rising Time
tRISE
CFAULT=1nF
100
FAULT Pin Falling Time
tFALL
CFAULT=1nF
100
ns
FAULT High Voltage Level
(VCC-VFAULT)
VFAULT_H
IFAULT=10mA
0.25
0.75
V
FAULT Low Voltage Level
VFAULT_L
IFAULT=10mA
0.25
0.75
V
FAULT Minimum Pulse Width
tD
Oscillator
Frequency=200kHz
20
μs
V
FLAG High Voltage Level
VFLAG-H
IFLAG=500μA
2
FLAG Low Voltage Level
VFLAG-L
IFLAG=500μA
0.25
0.75
V
Thermal Shutdown Temperature
TOTSD
160
ºC
Thermal Shutdown Hysteresis
THYS
20
ºC
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
1000
900
120
800
100
700
Frequency (kHz)
LED Current (mA)
140
80
VIN=12V, VPWM=5V
60
fPWM=70Hz
40
fPWM=200Hz
fPWM=500Hz
20
600
500
400
300
200
fPWM=1kHz
100
fPWM=2kHz
0
VIN=12V
0
0
20
40
60
80
100
0
40
80
120
160
200
240
280
320
RT (kΩ)
PWM Duty (%)
Figure 4. LED Current vs. PWM Duty
Figure 5. Frequency vs. RT
2.2
0.54
2.0
1.8
Supply Current (mA)
VFB (V)
0.52
0.50
0.48
1.6
1.4
1.2
VIN=12V
1.0
-50
VIN=24V
VIN=12V
0.46
-25
0
25
50
75
100
125
0.8
-75
150
-25
0
25
50
75
100
125
150
O
Figure 6. VFB vs. Temperature
Oct. 2012
-50
Temperature ( C)
o
Temperature ( C)
Figure 7. Supply Current vs. Temperature
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)
400
3.0
VPWM=0V
380
VIN=12V
VIN=24V
2.0
Frequency (kHz)
Shutdown Current (μA)
2.5
1.5
1.0
360
340
320
0.5
RT=82k
0.0
-40
0
40
80
120
300
-75
160
-50
-25
0
O
Temperature ( C)
25
50
75
100
125
150
O
Temperature ( C)
Figure 8. Supply Current vs. Temperature
Figure 9. Frequency vs. Temperature
0.8
14
0.7
12
CS Threshold (V)
VCC (V)
10
8
6
0.6
0.5
0.4
4
0.3
2
O
TA=25 C
VIN=12V
0
0.2
5
10
15
20
25
30
-75
Input Voltage (V)
-25
0
25
50
75
100
125
150
O
Temperature ( C)
Figure 10. VCC vs. Input Voltage
Oct. 2012
-50
Figure 11. CS Threshold vs. Temperature
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
PWM Threshold Voltage (V)
EN Threshold Voltage (V)
1.8
1.6
1.4
VIN=12V
1.2
1.6
1.4
1.2
Rising
Falling
Rising
Falling
1.0
1.0
-75
-50
-25
0
25
50
75
100
125
-75
150
-50
-25
0
25
50
75
100
125
150
O
Temperature ( C)
O
Temperature ( C)
Figure 12. EN Threshold Voltage vs. Temperature
Figure 13. PWM Threshold Voltage vs. Temperature
2.50
0.36
FB Low Threshold Voltage (V)
OV Thershold Voltage (V)
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
-75
VIN=12V
-50
-25
0
25
50
75
100
125
0.32
0.30
0.28
VIN=12V
0.26
-75
150
-50
-25
0
25
50
75
100
125
150
O
Temperature ( C)
O
Temperature ( C)
Figure 14. OV Threshold Voltage vs. Temperature
Oct. 2012
0.34
Figure 15. FB Low Threshold Voltage vs. Temperature
Rev. 1. 2
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Data Sheet
Boost Controller for WLED Driver in Medium-sized LCD Panel
AP3041
Typical Performance Characteristics (Continued)
0.40
1.350
OV Low Threshold Voltage (V)
FB High Threshold Voltage (V)
1.325
1.300
1.275
1.250
1.225
1.200
0.36
0.32
0.28
0.24
1.175
VIN=12V
VIN=12V
0.20
1.150
-75
-50
-25
0
25
50
75
100
125
-75
150
-50
-25
0
25
50
75
100
125
150
O
O
Temperature ( C)
Temperature ( C)
Figure 16. FB High Threshold Voltage vs. Temperature
Figure 17. OV Low Threshold Voltage vs. Temperature
36
6.8
6.4
CT Charge Current (μA)
Soft-start Current (μA)
32
28
24
20
VIN=12V
5.6
5.2
4.8
VIN=12V
4.4
VIN=24V
16
6.0
VIN=24V
4.0
-40
0
40
80
120
-40
160
40
80
120
160
Temperature ( C)
Figure 18. Soft-start Current vs. Temperature
Oct. 2012
0
O
O
Temperature ( C)
Figure 19.CT Charge Current vs. Temperature
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
1.350(0.053)
1.750(0.069)
7°
0.330(0.013)
0.510(0.020)
Unit: mm(inch)
1.250(0.049)
1.650(0.065)
7°
B
A
20:1
0.250(0.010)
0.400(0.016)
1.270(0.050)
0°
8°
R0.200(0.008)
R0.200(0.008)
0.050(0.002)
0.250(0.010)
5.800(0.228)
6.240(0.246)
3.800(0.150)
4.040(0.159)
9.5
°
8°
8°
0.200(0.008)
Sφ1.000(0.039)
Depth 0.200(0.008)
8°
A
0.400(0.016)×45°
C-C
50:1
B
20:1
C
3°
7°
0.200(0.008)
0.250(0.010)
C
Note: Eject hole, oriented hole and mold mark is optional.
Oct. 2012
Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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