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參數(shù)資料
| 型號(hào)： | RT8805 |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Two Phase General Purpose PWM Controller |
| 中文描述： | 兩相通用PWM控制器 |
| 文件頁(yè)數(shù)： | 5/15頁(yè) |
| 文件大小： | 387K |
| 代理商： | RT8805 |
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RT8805
Preliminary
5
DS8805-01 November 2005
www.richtek.com
Note 1.
Stresses listed as the above
"Absolute Maximum Ratings"
may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2.
Devices are ESD sensitive. Handling precaution recommended.
Note 3.
The device is not guaranteed to function outside its operating conditions.
Note 4.
θ
JA
is measured in the natural convection at T
A
= 25
°
C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Reference Voltage
Feedback Voltage
V
FB
V
FB
= 0.8V
0.784
0.8
0.816
V
Error Amplifier
DC Gain
60
70
--
dB
Gain-Bandwidth Product
GBW
C
LOAD
= 5pF
6
10
--
MHz
Trans-conductance
GM
R
LOAD
= 20k
Ω
600
660
--
μ
A/V
MAX Current (Source & Sink)
I
COMP
V
COMP
= 2.5V
300
360
--
μ
A
Current Sense GM Amplifier
OC
V
PHASE
R
IMAX
= 33k
Ω
--
-220
--
mV
Gate Driver
Maximum Upper Drive Source
I
UGATE(MAX)
BOOT
PHASE = 12V
1
--
--
A
Upper Drive Sink
R
UGATE
V
UGATE
= 1V
--
3.5
7
Ω
Maximum Lower Drive Source
I
LGATE(MAX)
PV
CC
= 12V
1
--
--
A
Lower Drive Sink
R
LGATE
V
LGATE
= 1V
--
2
4
Ω
Protection
Under Voltage Protection
0.55
0.6
0.65
V
Power Sequence
Power Good Threshold
3.4
3.7
4
V
Power Good Sink Capability (4mA)
--
0.05
0.2
V
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