CM8300 Datasheet PDF - Champion

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CM8300
Champion

Part Number CM8300
Description MULTIPLE-LED CURRENT BALANCER
Page 7 Pages


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CM8300
MULTIPLE-LED CURRENT BALANCER
GENERAL DESCRIPTION
FEATURES
The CM8300 is the Multiple-LED Current Balancer. It can be ! Ideal for 2 to unlimited-LED design
used for LED application. By implementing the Daisy
! Current Sense for photo-couple
Configuration, users can design a single network that can
! Self powered without additional power supply
drive many parallel LEDs, resulting in dramatic total system ! 8-Pin PSOP and PTSSOP, SOT-23-6 & SOT-89 Package
cost reduction.
! Absolute Maximum Voltage is 5VDC
! +/- 2.5% Current Tracking Accuracy
The CM8300 gets its power through the LED and therefore
does NOT require an additional power supply. The maximum
DC voltage is 5 VDC. Each pin can handle up to 10mA.
APPLICATIONS
! Multiple LED in LCD Backlight
PIN CONFIGURATION
PSOP-8 (PS08)/PTSSOP-8 (PT08)
Top View
1
ISLAVE3 ISLAVE2
8
2
COMM IMASTER
7
3
ISLAVE 4 ISLAVE1
6
4 NC
NC 5
SOT-23-6 (M26)
Top View
654
12 3
2002/08/12 Preliminary Rev. 1
Champion Microelectronic Corporation
Page 1



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PIN DESCRIPTION
CM8300
MULTIPLE-LED CURRENT BALANCER
Pin No.
1
2
3
4
5
6
7
8
Symbol
ISLAVE3
COMM
ISLAVE4
NC
NC
ISLAVE1
IMASTER
ISLAVE2
Description
Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
Common pin for lamp network
Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
Min.
Operating Rating
Typ.
Max.
30 50
Unit
mA
30 50 mA
30 50 mA
Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
Current output pin. Connect to master lamp.
Connect a serial resistor to ensure the lamp is
master
Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
30 50 mA
30 50 mA
30 50 mA
ORDERING INFORMATION
Part Number
CM8300IS
CM8300IT
CM8300IM26
BLOCK DIAGRAM
Temperature Range
-40~+85
-40~+85
-40~+85
Package
PSOP-8 (PS08)
PTSSOP-8 (PT08)
SOT-23-6 (M26)
IMASTER 7
ISLAVE 1 6
ISLAVE 2 8
ISLAVE 3 1
COMM
2
CHARGE PUMP
BIAS
TO INTERNAL CIRCUIT
Q1
1
R1
12
R2
12
Q2
1
R3
12
Q3
1
R4
12
Q4
1
+
-
+
-
+
-
+
-
BANDGAP
REFERENCE
3 ISLAVE 4
1 Q5
MOS-N
PHASE
DETECTOR
AND
CURRENT
TRACKING
CIRCUIT
DRIVER
1/5
2002/08/12 Preliminary Rev. 1
Champion Microelectronic Corporation
Page 2



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CM8300
MULTIPLE-LED CURRENT BALANCER
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings
are stress ratings only and functional device operation is not implied
Current on IMASTER, ISLAVE1, ISLAVE2, ISLAVE3 …. 50mA
Voltage on IMASTER, ISLAVE1, ISLAVE2, ISLAVE3 …. 5V
Current on ISENSE ………………………………………… 30mA
Junction Temperature ……………………………… +150°C
Storage Temperature …………….….….. -65 °C to +150°C
Lead Temperature (Soldering 10 Sec.) …….…….. +260°C
Thermal Resistance (θ JA) ……………………….. +150/W
OPERATING CONDITIONS
Temperature Range ............................. -40°C to +85°C
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply TA=25°C)
maximum ratings are stress ratings only and functional device operation is not implied.
Symbol
Parameter
Test Conditions
Min.
Current Tracking Test, ISLAVE1, ISLAVE2, ISLAVE3 = 5V and IMASTER=1mA
ISLAVE1
29.98
ISLAVE2
29.98
ISLAVE3
29.98
ISLAVE4
29.98
CM8300
Typ.
30
30
30
30
Max.
30.02
30.02
30.02
30.02
Unit
mA
mA
mA
mA
2002/08/12 Preliminary Rev. 1
Champion Microelectronic Corporation
Page 3



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CM8300
MULTIPLE-LED CURRENT BALANCER
TYPICAL APPLICATION SCHEMATIC FOR ORGANIC-LED CURRENT CONTROL
D1
O-LED
D2
O-LED
D3
O-LED
R1
150
5 NC
U1
NC 4
CM8300
6 I-SLAVE 1 I-SLAVE4 3
7 I-MASTER COMM 2
8 I-SLAVE2 I-SLAVE 3 1
D4
O-LED
D5
O-LED
5 NC
U2
NC 4
CM8300
6 I-SLAVE 1 I-SLAVE4 3
7 I-MASTER COMM 2
8 I-SLAVE2 I-SLAVE 3
D6
O-LED
1
VCC
D7
O-LED
D8
O-LED
D9
O-LED
5
6
NC U3
CM8300
NC
I-SLAVE 1 I-SLAVE4
4
3
7 I-MASTER COMM 2
8 I-SLAVE2 I-SLAVE 3 1
D10
O-LED
DN1
O-LED
DN2
O-LED
DN3
O-LED
R1
150
5 NC
UN1
NC 4
CM8300
6 I-SLAVE 1 I-SLAVE4 3
7 I-MASTER COMM 2
8 I-SLAVE2 I-SLAVE 3 1
DN4
O-LED
DN5
O-LED
5 NC
UN2
NC 4
CM8300
6 I-SLAVE 1 I-SLAVE4 3
7 I-MASTER COMM 2
8 I-SLAVE2 I-SLAVE 3
DN6
O-LED
1
VCC
DN7
O-LED
DN8
O-LED
DN9
O-LED
5
6
NC UN3
CM8300
NC
I-SLAVE 1 I-SLAVE4
4
3
7 I-MASTER COMM 2
8 I-SLAVE2 I-SLAVE 3 1
DN10
O-LED
2002/08/12 Preliminary Rev. 1
Champion Microelectronic Corporation
Page 4



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