SP7121 Datasheet, PDF (2/11 Pages) Sipex Corporation – 2-Channel Adjustable Low Dropout High Side Linear LED Driver

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.
Maximum LED current ILED1, ILED2……….30mA
Vcc, V_LED1, V_LED2, and EN to GND -0.3V to 6V
Ambient operating temperature ……. -40°C - +85°C
ABSOLUTE MAXIMUM RATINGS
Junction Temperature...........................+150°C
Operating Temperature….........….-40 to +85^oC
Storage Temperature..............-65°C to +150°C
Package Thermal resistance θJA ……190°C/W
ESD Level..........................................2kV HBM
ESD Level Enable pin…….…… ….1.5KV HBM
ESD Level ISET pin (4)……...…..….1.5KV HBM
ESD Level..........................................200V MM
Lead Temperature (Soldering, 10 sec)....300°C
RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
Specifications are at TA=25°C, Vcc = 2.7V to 5.5V, ENABLE =Vcc, ILED=15mA unless specified.
Parameter
Vcc
Shutdown Current
VLED Dropout Voltage, Vd ¹
LED to LED Current Matching
LED Current Line Regulation²
LED Current Load Regulation³
LED Current Thermal Regulation
EN ON Voltage (HIGH)⁴
EN OFF Voltage (LOW)
EN Input Bias Current
EN Switching Frequency
EN ON Minimum Pulse Width
LED current per channel
ISET Voltage
ISET current multiplication ratio
Min Typ Max Units Conditions
2.7
5.5
V
0.04 1
µA EN = LOW
135 200 mV Vcc = 5.5V, ILED = 20mA
1 0.2 1
% Vcc = 5.5V, Vd > 200mV
0.3 %/V 2.7V < Vcc < 5.5V
0.3
mA/V
Vcc=3.7V;
150mV < Vd < 1.0V
0.01
%/⁰C Vd = 300mV
2.4
Vcc
V
0
0.8
V
2
3
5
µA VEN = Vcc = 5.5V
20 kHz
15
µs
10
25 mA
1.17 1.21 1.26 V VEN=Vcc=3.7V
200 205 210
VEN=Vcc=3.7V
1) Difference between Vcc voltage and LED anode voltage at which ILED current drops 10% from nominal value
2) ILED Current Variations per Volt Vcc change
3) ILED Current Variations at Vd change from 0.15 to 1.0V
4) EN input voltage should not exceed Vcc voltage at any condition
Sept 11 - 07 Rev E
SP7121 Low Dropout LED Driver
Page 2
© 2007 Sipex Corporation