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RT9451 数据表(PDF) 8 Page - Richtek Technology Corporation

部件名 RT9451
功能描述  Switch-Mode Single Cell Li-ion Battery Charger with USB OTG
PDF  37 Pages
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制造商  RICHTEK [Richtek Technology Corporation]
网页  http://www.richtek.com
标志 RICHTEK - Richtek Technology Corporation

RT9451 数据表(HTML) 8 Page - Richtek Technology Corporation

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RT9451
8
DS9451-00
September 2013
www.richtek.com
©
Copyright
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Charger Protection
Input VIN Threshold Voltage
Threshold over VIN to turn off converter
during charge
11
12
13
V
VIN Hysteresis
VIN_OVP
VIN falling from above VIN_OVP
--
140
--
mV
Battery OVP Threshold
Voltage
VOVP_BATS
VBATS threshold over VOREG to turn off
charger during charge (% VOREG)
110
117
121
%
OVP Hysteresis
ΔOVP_BATS
Lower limit for VBATS falling from >
VOVP (% VOREG)
--
11
--
%
Cycle-by-Cycle Current Limit
for Charge
ILIMIT
Charge Mode Operation
5
7
9
A
Trickle to Fast Charge
Threshold
VSHORT
VBATS rising, VSHORT connected to
VDDP
1.9
2.1
2.2
V
VSHORT Hysteresis
ΔVSHORT
VBATS falling from above VSHORT
--
100
--
mV
Trickle Charge Charging
Current
ISHORT
VBATS ≤ VSHORT
70
80
90
mA
Thermal Regulation
Threshold
Charge current begins to taper down
--
120
--
°C
Time Constant for the
32-Second Timer
T32S
32 Second Mode
--
32
--
s
LDO
LDO Output Voltage
VLDO
VIN = 5.5V
4.8
4.9
5
V
PSRR
f = 100Hz, CLDO = 1μF
--
60
--
dB
Maximum LDO Output
Current
ILDO
60
--
--
mA
Dropout Voltage
VDO
VIN = 4.5V, ILDO = 50mA
--
100
250
mV
D+ / D
− Detection
D+ Voltage Source
VDP_SCR
0.5
0.6
0.7
V
D+ Voltage Source Output
Current
250
--
--
μA
D
− Current Sink
IDM_SINK
50
100
150
μA
DM Pin, Switch Open
--
4.5
5
Input Capacitance
CI
DP Pin, Switch Open
--
4.5
5
pF
DM Pin, Switch Open
−1
--
1
Input Leakage
II
DP Pin, Switch Open
−1
--
1
μA
DP Low Comparator
Threshold
VDP_LOW
0.8
--
--
V
DM High Comparator
Threshold
VDM_HIGH
0.8
--
--
V
DM Low Comparator
Threshold
VDM_LOW
--
--
475
mV
Logic Levels and Timing Characteristics (SCL, SDA, INT)
Output Low Threshold Level VOL
IO = 3mA, Sink Current (SDA, INT)
--
--
0.4
V
Input Low Threshold Level
--
--
0.4
V



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