PA5910
95220
ANALOG PRODUCTS DIVISION
Features
•
Constant current LED driver:
•
20mA to 2A programmable
•
Step-up or step-down operation
•
>90 efficiency
•
2.5V to 450V
•
Up to 2MHz switching frequency
Applications
•
•
•
•
•
DC/DC LED Drivers
AC/DC LED Drivers
RGB Backlighting
Flat Panel Backlighting
Signs and Decorative LED Lighting
Description
The PA5910 is a high efficiency LED driver control
Integrated Circuit.
It is a universal control LED driver that can be
configured to operate as a step-up or step-down
LED driver.
The input and output voltage can be extended
beyond 450V.
The PA5910 uses a fixed off time and 2MHz
switching frequency can be achieved.
The minimum off time can be set by an external
capacitor and resistor. R
OFF
and C
OFF
The LED current is programmable from 20mA to
2.0A and is set by an external resistor.
Switching Type LED Driver.
Pin Designation
Description
1：Ground
1
2
3
4
8
7
6
5
Symbol
V
SS
EN
Description
8：Power supply (2V-6.5V)
7：Off time selection
Symbol
V
DD
T
OFF
2：Chip Enable
3：No connection
4：Voltage feedback
NC
GND
6：LED Current sensing
5：Driver
CS
DRV
Absolute Maximum Ratings
Type
Symbol
V
MAX
Voltage
V
MIN-MAX
T
MIN-MAX
Thermal
T
STORAGE
ESD
V
ESD
Storage temperature range
ESD voltage for human body model
-40-165
2000
o
Description
Maximum voltage on V
DD
pins
Voltage range on EN, CS and FB pins
Operation temperature range
Value
8
-0.3-V
DD
+0.3
-20-85
Unit
V
V
o
C
C
V
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95220 Rev.0. 04/09
NOT FOR USE IN LIFE SUPPORT SYSTEMS
1
PA5910
ANALOG PRODUCTS DIVISION
Block Diagram
Switching Type LED Driver.
VIN
L
VDD
BANDGAP
PA5910
TOFF
OFF
TIME
Zener Diode
2.5V – 5.5V
S
R
Q
DRV
EN
250mV
CS
R
TC
(Optional)
GND
R
CS
Fig.1
Electrical Characteristics.
Parameter
Power supply
CS pin feedback voltage
Operation current
Off time (without R
OFF
and C
OFF
)
Standby current
EN pin high level voltage
EN pin low level voltage
DRV Rising Time
DRV Falling Time
Symbol
V
DD
V
CS
I
DD
T
OFF
I
DDQ
V
ENH
V
ENL
T
RISE
T
FALL
500pF cap on DRV pin
500pF cap on DRV pin
2.0
0.8
50
50
Test Condition
Min
2.5
240
250
0.5
620
1
Typ
Max
6.5
260
1
Unit
V
mV
mA
nS
μA
V
V
nS
nS
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95220 Rev.0. 04/09
NOT FOR USE IN LIFE SUPPORT SYSTEMS
2
PA5910
ANALOG PRODUCTS DIVISION
Typical Applications
Step-Up LED Driver without Schottky Diode
VIN
L
Switching Type LED Driver.
VDD
BANDGAP
PA5910
TOFF
OFF
TIME
S
R
Q
DRV
EN
250mV
GND
CS
R
CS
Fig.2
Step-Up LED Driver with Schottky Diode
VIN
L
VDD
BANDGAP
PA5910
TOFF
OFF
TIME
S
R
Q
DRV
EN
250mV
Zener Diode
2.5V – 5.5V
GND
CS
R
CS
Fig.3
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95220 Rev.0. 04/09
NOT FOR USE IN LIFE SUPPORT SYSTEMS
3
PA5910
ANALOG PRODUCTS DIVISION
220VACIN Drive 45series 6 parallel white LED’s ILED = 120mA
Switching Type LED Driver.
AC~
R1
510K
220vAC In
BD1
300V 0.5A
D2
12V
D1
SF36
L1
10mH
LED+
AC~
C1
22μF 400V
C2
4.7μF
LED-
Q1
5N60
D4
1N5819
R2
330Ω
PA5910
1 V
SS
2 EN
3 NC
V
CC
8
T
OFF
7
CS 6
DRV 5
R3
100K
Q2
AP2306
C4
470pF
C2
4.7μF
D3
5.1V
4 GND
R4
2.5Ω
Fig.4
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95220 Rev.0. 04/09
NOT FOR USE IN LIFE SUPPORT SYSTEMS
4
PA5910
ANALOG PRODUCTS DIVISION
220VACIN Drive 12 series connected 1WATT white LED’s
AC~
R1
510K
220vAC In
BD1
300V 0.5A
D2
12V
D1
SF36
LED2
1Watt
LED3
1Watt
Q1
5N60
LED4
1Watt
L1
10mH
LED1
1Watt
Switching Type LED Driver.
AC~
C1
22μF 400V
C2
4.7μF
D4
1N5819
R2
330Ω
PA5910
1 V
SS
2 EN
3 NC
V
CC
8
T
OFF
7
CS 6
DRV 5
R3
100K
Q2
AP2306
C4
470pF
LED11
1Watt
LED12
1Watt
C2
4.7μF
D3
5.1V
4 GND
R4
2.5Ω
Fig.5.
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95220 Rev.0. 04/09
NOT FOR USE IN LIFE SUPPORT SYSTEMS
5
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