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LP55231 데이터시트(PDF) 5 Page - Texas Instruments

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부품명 LP55231
상세설명  LP55231 Programmable 9-Output LED Driver
PDF  53 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

LP55231 데이터시트(HTML) 5 Page - Texas Instruments

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LP55231
www.ti.com
SNOSCR5 – MARCH 2013
ELECTRICAL CHARACTERISTICS
(1) (2) (3)
Limits in standard typeface are for TA = 25°C. Limits in boldface type apply over the operating ambient temperature range
(
−30°C < TA < +85°C). Unless otherwise noted, specifications apply to the LP55231 Block Diagram with: VDD = 3.6V, VEN =
1.65V, COUT = 1.0 µF, CIN = 1.0 µF, C1–2 = 0.47 µF.
(4)
Symbol
Parameter
Condition
Min
Typ
Max
Units
VEN = 0V, CHIP_EN=0 (bit), external 32 kHz clock running
0.2
1
µA
or not running
Standby supply
current
CHIP_EN=0 (bit), external 32 kHz clock not running
1.0
1.7
µA
CHIP_EN=0 (bit), external 32 kHz clock running
1.4
2.3
µA
External 32 kHz clock running, charge pump and current
0.6
0.75
mA
source outputs disabled
IVDD
Normal Mode
Charge pump in 1x mode, no load, current source outputs
0.8
0.95
mA
Supply Current
disabled
Charge pump in 1.5x mode, no load, current source
1.8
mA
outputs disabled
External 32 kHz clock running
10
15
µA
Power Save Mode
Supply Current
Internal oscillator running
0.6
0.75
mA
Internal Oscillator
−4
+4
fOSC
%
Frequency Accuracy
−7
+7
(1)
The Electrical characteristics tables list specifications under the listed Recommended Conditions except as otherwise modified or
specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not verified.
(2)
All voltages are with respect to the potential at the GND pin.
(3)
Min and Max limits are verified by design, test, or statistical analysis.
(4)
Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
CHARGE PUMP ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Condition
Min
Typ
Max
Units
Gain = 1.5x
3.5
ROUT
Charge Pump Output Resistance
Ω
Gain = 1x
1
fSW
Switching Frequency
1.25
MHz
Gain = 1.5x
1.2
IGND
Ground Current
mA
Gain = 1x
0.3
tON
VOUT Turn-On Time
(1)
VDD = 3.6V, IOUT = 60 mA
100
µs
(1)
Turn-on time is measured from the moment the charge pump is activated until the VOUT crosses 90% of its target value.
Copyright © 2013, Texas Instruments Incorporated
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