CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 1
GENERAL DESCRIPTION
FEATURES
! Ideal for 2 to unlimited-LED design
! Current Sense for photo-couple
! Self powered without additional power supply
! 8-Pin PSOP and PTSSOP, SOT-23-6 & SOT-89 Package
! Absolute Maximum Voltage is 5VDC
! +/- 2.5% Current Tracking Accuracy
The CM8300 is the Multiple-LED Current Balancer. It can be
used for LED application. By implementing the Daisy
Configuration, users can design a single network that can
drive many parallel LEDs, resulting in dramatic total system
cost reduction.
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 CONFIG UR ATION
PSOP-8 (PS08)/PTSSOP-8 (PT08)
Top View
1
2
3
4
8
7
6
5
ISLAVE3
COMM
ISLAVE 4
NC
ISLAVE2
IMASTER
ISLAVE1
NC
SOT-23-6 (M26)
Top View
1
6
3
ISLAVE3 ISLAVE2
ISLAVE4
2
4
ISLAVE1
COMM
5
IMASTER
CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 2
PIN DESCRIPTION
Operating Rating
Pin No. Symbol Description Min. Typ. Max. Unit
1 ISLAVE3 Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
30 50 mA
2 COMM Common pin for lamp network 30 50 mA
3 ISLAVE4 Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
30 50 mA
4 NC
5 NC
6 ISLAVE1 Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
30 50 mA
7 IMASTER Current output pin. Connect to master lamp.
Connect a serial resistor to ensure the lamp is
master
30 50 mA
8 ISLAVE2 Current output pin. Connect to one of the slave
lamp and the current will follow the IMASTER
30 50 mA
ORDERING INFORMATION
Part Number Temperature Range Package
CM8300IS -40℃~+85℃ PSOP-8 (PS08)
CM8300IT -40℃~+85℃ PTSSOP-8 (PT08)
CM8300IM26 -40℃~+85℃ SOT-23-6 (M26)
BLOCK DIAGR AM
+
Q2
1
23
-
-
-
IMASTER
DRIVER
-
CHARGE PUMP
7
+
1
R2
21
+
TO INTERNAL CIRCUIT
R4
21
8
R1
21
Q3
1
23
+
ISLAVE 1
ISLAVE 3
REFERENCE
BIAS
2
Q5
MOS-N
1
23
ISLAVE 2
R3
21
3
CURRENT
TRACKING
CIRCUIT
6
Q1
1
23
COMM
1/5
PHASE
DETECTOR
ISLAVE 4
AND
Q4
1
23
BANDGAP
CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 3
A BSOLUTE 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 Junction Temperature ……………………………… +150°C
Voltage on IMASTER, ISLAVE1, ISLAVE2, ISLAVE3 …. 5V Storage Temperature …………….….….. -65 °C to +150°C
Current on ISENSE ………………………………………… 30mA 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.
CM8300
Symbol Parameter Test Conditions
Min. Typ. Max.
Unit
Current Tracking Test, ISLAVE1, ISLAVE2, ISLAVE3 = 5V and IMASTER=1mA
ISLAVE1 29.98 30 30.02 mA
ISLAVE2 29.98 30 30.02 mA
ISLAVE3 29.98 30 30.02 mA
ISLAVE4 29.98 30 30.02 mA
CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 4
DN8
O-LED
DN10
O-LED
D10
O-LED
U3
CM8300
2
1
3
45
6
7
8
COMM
I-SLAVE 3
I-SLAVE4
NCNC
I-SLAVE 1
I-MASTER
I-SLAVE2
DN3
O-LED
DN1
O-LED
D7
O-LED
D1
O-LED
D4
O-LED
D2
O-LED
DN4
O-LED
DN6
O-LED
D5
O-LED
D9
O-LED
UN3
CM8300
2
1
3
45
6
7
8
COMM
I-SLAVE 3
I-SLAVE4
NCNC
I-SLAVE 1
I-MASTER
I-SLAVE2
U1
CM8300
2
1
3
45
6
7
8
COMM
I-SLAVE 3
I-SLAVE4
NCNC
I-SLAVE 1
I-MASTER
I-SLAVE2
D6
O-LED
D8
O-LED
U2
CM8300
2
1
3
45
6
7
8
COMM
I-SLAVE 3
I-SLAVE4
NCNC
I-SLAVE 1
I-MASTER
I-SLAVE2
VCC
R1
150
VCC
DN5
O-LED
UN2
CM8300
2
1
3
45
6
7
8
COMM
I-SLAVE 3
I-SLAVE4
NCNC
I-SLAVE 1
I-MASTER
I-SLAVE2
D3
O-LED
UN1
CM8300
2
1
3
45
6
7
8
COMM
I-SLAVE 3
I-SLAVE4
NCNC
I-SLAVE 1
I-MASTER
I-SLAVE2
R1
150
DN7
O-LED
DN2
O-LED
DN9
O-LED
TYPICAL APPLICATION SCHEMATIC FOR ORGANIC-LED CURRENT CONTROL
CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 5
PACKAGE DIMENSIO N
8-PIN PSOP (PS08)
θ
θ
8-PIN PTSSOP (PT08)
θ
θ
CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 6
PACKAGE DIMENSIO N
SOT-23-6 (M26)
E1
L
c1
D
E
A
A2
A1
b
b1
c
θ
θ2
θ1
e1
e
L1
D
E
E1
e
e1 b
A2
A
θ2
θ1
A1
b1
b
c
c1
Base Metal
With Plating
Section
B-B
See
Section
B-B
L1
L
θ
123
64
5
CM8300
MULTIPLE-LED CURRENT B
ALANCER
2002/08/12 Preliminar y Rev. 1 Champion Microelectronic Corporation Page 7
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue
any integrated circuit product or service without notice, and advises its customers to obtain the latest version of
relevant information to verify, before placing orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe
property or environmental damage. CMC integrated circuit products are not designed, intended, authorized, or
warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of
CMC products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer’s applications, the customer should provide adequate design and operating
safeguards.
HsinChu Headquarter Sales & Marketing
5F, No. 11, Park Avenue II,
Science-Based Industrial Park,
HsinChu City, Taiwan
11F, No. 306-3, Sec. 1, Ta Tung Rd.,
Hsichih, Taipei Hsien 221
Taiwan, R.O.C.
T E L : +886-3-567 9979 T E L : +886-2-8692 1591
FAX: +886-3-567 9909 F A X : +886-2-8692 1596
http://www.champion-micro.com
