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RT9451 数据表(PDF) 7 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) 7 Page - Richtek Technology Corporation

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RT9451
7
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
Stat Output
Low Level Output Saturation
Voltage
IO = 10mA, Sink Current
--
--
0.4
V
High Level Leakage Current
Voltage on STAT pin is 5V
--
--
1
μA
Reverse Protection Comparator
Reverse Protection Threshold,
VIN − VBATS
VSLP
2.3V
≤ VBATS ≤ VOREG, VIN Falling
0
40
100
mV
Reverse Protection Exit
Hysteresis
VSLP-EXIT
2.3V
≤ VBATS ≤ VOREG
40
100
200
mV
Deglitch Time for VIN Rising
above VSLP + VSLP−EXIT
Rising Voltage
--
30
--
ms
VIN UVLO
Under-Voltage Lockout
Threshold
VUVLO
VIN Rising
3.05
3.3
3.55
V
Under-Voltage Lockout
Threshold Hysteresis
ΔVUVLO
VIN falling from above VUVLO
120
150
--
mV
PWM
High-Side RDSON_UG AICR = None, from VIN to LX
--
80
160
Internal N-MOSFET
On-Resistance
Low-Side
RDSON_LG from LX to PGND
--
60
120
m
Ω
Maximum Duty Cycle
DMAX
--
99.5
--
%
Minimum Duty Cycle
DMIN
0
--
--
%
Boost Mode Operation for VIN
Boost Output Voltage Accuracy
2.5V < VIN < 4.5V; Including line
and load regulation over full temp
range
−5
--
5
%
Maximum Output Current for
Boost
VIN_B = 5V, 2.5V < VBATS < 4.5V
1600
--
--
mA
Cycle-by-Cycle Current Limit
for Boost
VIN_B = 5V, 2.5V < VBATS < 4.5V
4
6
8
A
Over-Voltage Protection
Threshold for Boost (VIN Pin)
VIN_BOVP
Threshold over VIN to turn off
converter during boost
5.6
6
6.3
V
Over-Voltage Protection
Hysteresis
ΔVIN_BOVP VIN falling from above VIN_BOVP
--
200
--
mV
Maximum Battery Voltage for
Boost
VBATMAX
VBATS rising edge during boost
4.5
4.75
5
V
Maximum Battery Voltage
Hysteresis
ΔVBATMAX VBATS falling from above VBATMAX
--
200
--
mV
During Boosting
--
2.5
--
Minimum Battery Voltage for
Boost (BATS pin)
VBATMIN
Before boost Starts
--
2.9
3.05
V



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