RT8202A データシートの表示（PDF） - Richtek Technology
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RT8202A Datasheet PDF : 19 Pages
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RT8202/A/B
Parameter
Symbol
Test Conditions
Min
FB Reference Voltage
VFB
FB Input Bias Current
VDD = 4.5 to 5.5V
FB = 0.75V
0.742
1
Output Voltage Range
VOUT
On-Time
Minimum Off-Time
VOUT Shutdown Discharge
Resistance
Current Sensing
ILIM Source Current
Current Comparator Offset
0.75
VIN = 15V, VOUT = 1.25V, RTON = 1M 267
250
EN/DEM = GND
--
LGATE = High
18
GND OC
10
Current Limit Setting Range RILIM
2.5
Zero Crossing Threshold
GND PHASE, EN/DEM = 5V
10
Fault Protection
Current Limit Sense
Voltage
Output UV Threshold
OVP Threshold
OV Fault Delay
VDD UVLO Threshold
Soft-Start Ramp Time
UV Blank Time
VRILIM
GND PHASE, RILIM = 2.5k
35
GND PHASE, RILIM = 10k
170
60
With respect to error comparator
threshold
10
FB forced above OV threshold
--
Rising edge, Hysteresis = 20mV,
PWM disabled below this level
4.1
From EN high to internal VREF reach
0.71V (095%)
--
From EN signal going high
--
Thermal Shutdown
--
Thermal Shutdown
Hysteresis
--
Driver On-Resistance
UGATE Driver Pull Up
BOOT PHASE = 5V
--
UGATE Driver Sink
RUGATEsk BOOT PHASE = 5V
--
LGATE Driver Pull Up
LGATE, High State (Source)
--
LGATE Driver Pull Down
LGATE, Low State (Sink)
--
UGATE Driver Source/Sink
Current
UGATE PHASE = 2.5V,
BOOT PHASE = 5V
--
LGATE Driver Source
Current
LGATE forced to 2.5V
--
LGATE Driver Sink Current
LGATE forced to 2.5V
--
Dead Time
LGATE Rising (PHASE = 1.5V)
--
UGATE Rising
--
Typ
0.75
0.1
--
334
400
20
20
--
--
--
50
200
70
15
20
4.3
1.35
3.1
155
10
1.5
1.5
1.5
0.6
1
1
3
30
30
Max Unit
0.758 V
1
A
3.3
V
401 ns
550 ns
--
22
A
10 mV
10
k
5
mV
65
mV
230
80
%
20
%
--
s
4.5
V
--
ms
--
ms
--
°C
--
°C
5
5
5
2.5
--
A
--
A
--
A
--
ns
--
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
6
is a registered trademark of Richtek Technology Corporation.
DS8202/A/B-07 April 2014
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