ADTech ADT6051 Dimmable cc / cv ic for led lighting Datasheet

Dimmable Constant Current / Constant Voltage IC
Dimmable CC / CV IC for LED Lighting
ADT6051
ADT6051
GENERAL DESCRIPTION
The ADT6051 is a constant current and constant voltage IC for stable LED driving in a
secondary side. This IC is suitable for applications that require power line isolation for safety
and reliability, high conversion efficiency, as well as high LED current accuracy.
The ADT6051 contains 1) a constant current regulating amplifier with 300mV threshold and
within 1% current accuracy; 2) an VCC over voltage comparator to protect the IC when LED
string is open or broken; 3) a PWM and analog dimming control for LED lighting system;
4) and a DC output pin for driving an opto-coupler or sourcing power for the other devices.
The ADT6051 is offered in SOP8 package.
FEATURES
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•
•
•
•
•
•
•
•
•
APPLICATIONS
Secondary side LED current regulation
Operating range up to 60V
LED Current accuracy ≤ ±1%
Analog dimming control
PWM dimming control
DC 5V output
DC 5V output short protection
VCC over voltage protection
Over temperature protection
SOP8 package
• Isolated LED lighting
• Dimmable LED lighting
TYPICAL APPLICATION CIRCUIT
AC
•
•
•
•
•
•
•
VCC
LED
•
INV
GD
•
PWM
ADIM
Q1
DC5V
•
ADT6011
VSEN
• •
ADT6051
ISEN
•
•
COMP
•
OUT
GND
Figure 1. Typical Application Circuit
•
* This specifications are subject to be changed without notice
DEC. 15. 2014
1/4
http://www.ad-tech.co.kr
Dimmable Constant Current / Constant Voltage IC
ADT6051
PIN CONFIGURATION
Pin Name
Description
1
ISEN
Constant current control input.
2
ADIM
Analog dimming input.
3
PWM
PWM dimming input.
4
GND
Ground.
5
VCC
Supply voltage input.
6
VSEN
Constant voltage control input
7
DC5V
5V LDO output
8
OUT
Open-drain output. Connects this pin to opto-coupler.
ISEN
1
ADIM
2
PWM
3
GND
4
ADT6051
Pin No.
8
OUT
7
DC5V
6
VSEN
5
VCC
SIMPLIFIED BLOCK DIAGRAM
•
•
•
VCC
•
•
DC5V
•
5V Regulator
VCCOVP
1V
•
VSEN
OUT
•
ISEN
•
•
•
1V
5V
0.3V
•
•
600kohm
• • •
Dimming
control
GND
•
PWM
150kohm
•
OTP
ADIM
100kohm
•
* This specifications are subject to be changed without notice
DEC. 15. 2014
2/4
http://www.ad-tech.co.kr
Dimmable Constant Current / Constant Voltage IC
ADT6051
ABSOLUTE MAXIMUM RATINGS (Note1)
Parameter
Symbol
Rating
Units
Ground Voltage
GND
-0.3
V
Power Voltage
VCC
-0.3 ~ 60
V
Open Drain Output
OUT
-0.3 ~ 60
V
All Other pins
DC5V, VSEN, ISEN, PWM, ADIM
-0.3 ~ 6
V
Junction Temperature
TJ
-40 ~ 150
℃
Storage Temperature
TSTG
-65 ~ 150
℃
Thermal Resistance (Note2)
θJA
150
℃/W
Note1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
Note2. Measured on JESD51-7, 4-layer PCB
ELECTRICAL CHARACTERISTICS
(VCC = 15V, Ta=25°C , unless otherwise specified)
Parameter
Conditions
Symbol
Min.
Typ.
VCC
8
15
55
V
VCCOVP
55
58.5
-
V
VCCLEDOFF
8.5
10
11.5
V
ICC
-
0.5
1.0
mA
PWM input high level
VPWMH
1.5
-
-
V
PWM input low level
VPWML
-
-
0.8
V
PWM dimming frequency
FPWM
0.1
-
100
kHz
PWM duty range
DPWM
10
-
100
%
Threshold duty (LED OFF) (Note3)
DOFF
3.7
6.7
9.7
%
Threshold duty (LED ON) (Note3)
DON
7
10
13
%
Power supply operating range
Device supply
PWM
dimming
VCC OVP
LED off VCC
V(ADIM)=0V
VCC quiescent current
V(ISEN)=V(VSEN)=0V
Pull up current
Analog
dimming
V(PWM)=0V
IPULLUP
-
9
15
uA
Analog dimming input voltage
VADIM
0.1
-
1.0
V
Threshold voltage (LED OFF)
VOFF
37
67
97
mV
Threshold voltage (LED ON)
VON
70
100
130
mV
IADIM
-3
0
3
uA
GMISEN
-
9.5
-
V/A
Pin input current
V(ADIM)=1V
Transconductance, Sink current only (Note3)
Current
control loop
Current sensing reference voltage
I(OUT)=100uA
VISEN
297
300
303
mV
Pin input current
V(ISEN)=5V
IISEN
-1
0
1
uA
GMVSEN
-
5.2
-
V/A
Transconductance, Sink current only (Note3)
Voltage
control loop
Output stage
DC 5V output
Temperature
protection
Max. Units
Voltage sensing reference voltage
I(OUT)=100uA
VVSEN
0.95
1.00
1.05
V
Pin input current
V(VSEN)=5V
IVSEN
-1
0
1
uA
Lower output voltage, Sink current only
I(OUT)=1mA, V(ISEN)=1V
VOL
-
0.7
1.1
V
Output short circuit current.
V(OUT)=5V, V(ISEN)=1V
IOUTMAX
3
6
10
mA
DC 5V output voltage
I(DC5V)=5mA
VDC5V
4.5
5.0
5.5
V
Output short circuit current.
V(DC5V)=0V
IDC5Vmax
8
16
24
mA
OTP
-
150
-
℃
OTPHYS
-
40
-
℃
Over temperature protection (Note3)
OTP hysteresis (Note3)
Note 3 : The parameter is guaranteed by design. It is not tested in production.
* This specifications are subject to be changed without notice
DEC. 15. 2014
3/4
http://www.ad-tech.co.kr
Dimmable Constant Current / Constant Voltage IC
ADT6051
PACKAGE DIMENSTION
* This specifications are subject to be changed without notice
DEC. 15. 2014
4/4
http://www.ad-tech.co.kr
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