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SP7120 Datasheet Preview

SP7120 Datasheet

(SP7120 / SP7122) 2 or 3 Channel Low Dropout High Side Linear LED Driver

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SP7120/22
2 or 3 Channel Low Dropout
High Side Linear LED Driver
FEATURES
LED Driver for common cathode parallel
connected LEDs
Ultra Low Dropout Voltage of 150mV
No EMI, no switching noise
Integrated current matching
PWM and Analog brightness control
Enable/Shutdown control
Shutdown current < 1µA
Lead Free, RoHS Compliant Package:
Small footprint SOT23-6
APPLICATIONS
Mobile Phones
PDA, DSC, MP3 players
Handheld Computers
Keypads and display backlight
GENERAL DESCRIPTION
The SP712X driver’s family provides a simple solution for a matched current source for any
color common cathode LED configuration. The common cathode connection allows the user to
increase the LED power dissipation by having the cathodes heat-sinked to the ground plane of
the circuit board. The SP7120 may drive two LEDs or one LED at twice the current with two
channels connected in parallel. The SP7122 can drive three LEDs or one LED at three times
the current. The factory preset current values are 15mA (version A), 20mA (version B), or 25mA
(version C) per channel. In shutdown mode (EN pin is LOW), the supply current drops to 40nA
typical. The SP712x drivers are available in a small footprint 6-pin SOT23-6 package.
APPLICATION SCHEMATIC
Jun29-07 RevD
C1 1nF
SP7120 Powering 2 LEDs
SP7120/22 Low Dropout LED Driver
page 1
© 2007 Sipex Corporation




Sipex

SP7120 Datasheet Preview

SP7120 Datasheet

(SP7120 / SP7122) 2 or 3 Channel Low Dropout High Side Linear LED Driver

No Preview Available !

These are stress ratings only and functional operation
of the device at these ratings or any other above
those indicated in the operation sections of the
specifications below is not implied. Exposure to
absolute maximum rating conditions for extended
period may affect reliability.
RECOMMENDED OPERATING CONDITIONS
Ambient operating temperature ..…. -40 to+85°C
ABSOLUTE MAXIMUM RATINGS
Vcc, VLED1, VLED2, and EN to GND -0.3V to 6V
Junction Temperature............................+150°C
Operating Temperature…..........….-40 to +85oC
Storage Temperature...............-65°C to +150°C
Package Thermal resistance θJA ….…190°C/W
ESD Level...........................................2kV HBM
ESD Level...........................................200V MM
ESD Level EN……………….……….1.5kV HBM
Lead Temperature (Soldering, 10 sec) …300°C
Specifications are at TA=25˚C, Vcc = 2.7 to 5.5, ENABLE =Vcc
Parameter
Vcc
Shutdown Current
VLED Dropout Voltage, Vd 1
VLED Dropout voltage, Vd1
LED Current per
Channel
Version A
Version B
Version C
Version A
Version B
Quiescent
Version C
Current
Version A
Version B
Version C
LED to LED Current Matching6
LED Current Accuracy2
LED Current Line Regulation3
LED Current Load Regulation4
LED Current Thermal Regulation
EN ON Voltage (HIGH)5
EN OFF Voltage (LOW)
EN Input Bias Current
EN Switching Frequency
EN ON Minimum Pulse Width
Min Typ
2.7
0.04
160
140
15
20
25
0.5
0.7
0.86
0.6
0.9
0.99
0.8
-3
0.01
2
0
23
Max
5.5
1
200
180
0.7
1.1
1.7
0.8
1.2
1.9
3
.25
1.0
Vcc
0.8
5
20
15
ELECTRICAL CHARACTERISTICS
Units
V
µA
mV
mV
mA
Conditions
EN = LOW
Vcc = 5.5V, ILED = 20mA
Vcc = 5.5V, ILED = 15mA
VD = 300mV
VD = 300mV
VD = 300mV
SP7120 at VD = 300mV
mA
SP7122 at VD = 300mV
%
%
%/V
%/mA
%/0C
V
V
µA
kHz
µs
Vcc = 5.5V, VD > 300mV
300mV<VD<1.0V
2.7V < Vcc < 5.5V
300mV < VD < 1.0V
VD = 300mV
VEN = Vcc = 5.5V
1) Difference between Vcc voltage and LED anode voltage at which ILED current drops 10% from nominal value
2) ILED Current Variations from specified value
3) ILED Current Variations per volt Vcc change for any given temperature
4) ILED Current Variations at VD change from 0.3V to 1.0V
5) EN input voltage should not exceed Vcc voltage at any condition
6) This condition is part of the LED current accuracy and it shall not exceed that specification
Jun29-07 RevD
SP7120/22 Low Dropout LED Driver
page 2
© 2007 Sipex Corporation


Part Number SP7120
Description (SP7120 / SP7122) 2 or 3 Channel Low Dropout High Side Linear LED Driver
Maker Sipex
Total Page 17 Pages
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