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| 型号： | SP7122BEB |
| 厂商： | Exar Corporation |
| 文件页数： | 2/18页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP7122B |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 15mA |
| 输出及类型： | 2，非隔离 |
| 特点： | PWM 亮度控制 |
| 输入电压： | 2.7 ~ 5.5 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | SP7120A |
ABSOLUTE MAXIMUM RATINGS
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
Vcc, V LED1 , V LED2 , and EN to GND -0.3V to 6V
Junction Temperature............................+150°C
Operating Temperature…..........….-40 to +85 o C
Storage Temperature...............-65°C to +150°C
Package Thermal resistance θ JA ….…190°C/W
ESD Level...........................................2kV HBM
ESD Level...........................................200V MM
ESD Level EN……………….……….1.5kV HBM
Lead Temperature (Soldering, 10 sec) …300°C
Ambient operating temperature ..…. -40 to+85°C
ELECTRICAL CHARACTERISTICS
Specifications are at T A =25 ? C, Vcc = 2.7 to 5.5, ENABLE =Vcc
Parameter
Vcc
Shutdown Current
VLED Dropout Voltage, Vd 1
VLED Dropout voltage, Vd 1
Min
2.7
Typ
0.04
160
140
Max
5.5
1
200
180
Units
V
μ A
mV
mV
Conditions
EN = LOW
Vcc = 5.5V, I LED = 20mA
Vcc = 5.5V, I LED = 15mA
Accuracy
LED Current
2
Version A
Version B
Version C
14
19
24
15
20
25
16
21
26
mA
300mV<V D <1.0V
300mV<V D <1.0V
300mV<V D <1.0V
Version A
0.5
0.7
Version B
0.7
1.1
SP7120 at V D = 300mV
Quiescent
Current
Version C
Version A
Version B
0.86
0.6
0.9
1.7
0.8
1.2
mA
SP7122 at V D = 300mV
Version C
LED to LED Current Matching 6
LED Current Line Regulation 3
LED Current Load Regulation 4
LED Current Thermal Regulation
EN ON Voltage (HIGH) 5
EN OFF Voltage (LOW)
EN Input Bias Current
2
0
2
0.99
0.8
0.01
3
1.9
.25
1.0
Vcc
0.8
5
%
%/V
%/mA
%/ 0 C
V
V
μ A
Vcc = 5.5V, V D > 300mV
2.7V < Vcc < 5.5V
300mV < V D < 1.0V
V D = 300mV
V EN = Vcc = 5.5V
EN Switching Frequency
EN ON Minimum Pulse Width
20
15
kHz
μ s
1) Difference between Vcc voltage and LED anode voltage at which I LED current drops 10% from nominal value
2) I LED Current Variations from specified value
3) I LED Current Variations per volt Vcc change for any given temperature
4) I LED Current Variations at V D 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
Jan 7 ‘08 RevE
SP7120/22 Low Dropout LED Driver
page 2
? 2007 Sipex Corporation
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