参数资料
型号: LM2795BL/NOPB
厂商: National Semiconductor
文件页数: 4/23页
文件大小: 0K
描述: IC LED DRVR WHT BCKLT 14USMD
标准包装: 1
恒定电流:
拓扑: PWM,切换式电容器(充电泵)
输出数: 4
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 325kHz ~ 515kHz
电源电压: 2.7 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 14-VFBGA
供应商设备封装: 14-uSMD
包装: 标准包装
工作温度: -30°C ~ 85°C
配用: LM2795EVAL-ND - BOARD EVALUATION LM2795
其它名称: LM2795BLDKR
SNVS168L – JANUARY 2002 – REVISED MAY 2013
Electrical Characteristics (continued)
Limits in standard typeface are for T J = 25°C and limits in boldface type apply over the full Operating Junction
Temperature Range ( ? 30°C ≤ T J ≤ +100°C). Unless otherwise specified, C1 = C2 = C IN = C HOLD = 1 μF, V IN = 3.6V, BRGT
pin = 0V; R SET =124 ? ; LM2794:V SD = V IN (LM2795: V SD = 0V).
Symbol
I PULL-SD
Parameter
Shutdown Pull-Up Current
V IN = 3.6V
Conditions
Min
Typ
1.5
Max
Units
μA
(LM2795)
V CP
Input Charge-Pump Mode To Pass
4.7
V
Mode Threshold
V CPH
Input Charge-Pump Mode To Pass
(1)
250
mV
Mode Hysteresis
V IH
SD Input Logic High (LM2794)
3.0V ≤ V IN ≤ 5.5V
1.0
V
SD Input Logic High (LM2795)
0.8V IN
V IL
SD Input Logic Low (LM2794)
3.0V ≤ V IN ≤ 5.5V
0.2
V
SD Input Logic Low (LM2795)
0.2V IN
I LEAK-SD
R BRGT
I SET
SD Input Leakage Current
BRGT Input Resistance
I SET Pin Output Current
0V ≤ V SD ≤ V IN
100
240
I DX /10
nA
k ?
mA
f SW
Switching Frequency
(2)
3.0V ≤ V IN ≤ 4.4V
325
515
675
kHz
(1)
(2)
Voltage at which the device switches from charge-pump mode to pass mode or pass mode to charge-pump mode. For example, during
pass mode the device output (Pout) follows the input voltage.
The output switches operate at one eigth of the oscillator frequency, f OSC = 1/8f SW .
4
Product Folder Links: LM2794 LM2795
Copyright ? 2002–2013, Texas Instruments Incorporated
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