參數(shù)資料
型號(hào)： RT8803A
廠商： Richtek Technology Corporation
英文描述： 2/3-Phase PWM Controller for High-Density Power Supply
中文描述： 2/3-Phase PWM控制器的高密度電源
文件頁(yè)數(shù)： 16/27頁(yè)
文件大?。?/td> 553K
代理商： RT8803A
RT8803A
16
DS8803A-05 August 2007
www.richtek.com
All brandname or trademark belong to their owner respectively
Absolute Maximum Ratings
(Note 1)
z
Supply Voltage, V
DD
------------------------------------------------------------------------------------------- 7V
z
Input, Output or I/O Voltage---------------------------------------------------------------------------------- GND
-
0.3V to V
DD
+0.3V
z
Power Dissipation, P
D
@ T
A
= 25
°
C
VQFN
32L 5x5-------------------------------------------------------------------------------------------------- 2.778W
z
Package Thermal Resistance (Note 4)
VQFN-32L 5x5,
θ
JA
--------------------------------------------------------------------------------------------- 36
°
C/W
z
Junction Temperature------------------------------------------------------------------------------------------ 150
°
C
z
Lead Temperature (Soldering, 10 sec.)-------------------------------------------------------------------- 260
°
C
z
Storage Temperature Range ---------------------------------------------------------------------------------
65
°
C to 150
°
C
z
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV
MM (Machine Mode)------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
(Note 3)
z
Supply Voltage, V
DD
------------------------------------------------------------------------------------------- 5V
±
10%
z
Junction Temperature Range---------------------------------------------------------------------------------
40
°
C to 125
°
C
z
Ambient Temperature Range---------------------------------------------------------------------------------
40
°
C to 85
°
C
Electrical Characteristics
(V
DD
= 5V, T
A
= 25°C, unless otherwise specified)
To be continued
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
V
DD
Supply Current
Nominal Supply Current
I
DD
PWM 1,2,3 Open
--
12
16
mA
Power-On Reset
POR Threshold
V
DDRTH
V
DD
Rising
4.0
4.2
4.5
V
Hysteresis
V
DDHYS
0.2
0.5
--
V
V
DVD
Threshold
Trip (Low to High)
V
DVDTH
Enable
0.9
1.0
1.1
V
Hysteresis
V
DVDHYS
--
60
--
mV
V
TT
Threshold
Trip (Low to High)
V
TTTH
Enable
0.75
0.85
0.95
V
Hysteresis
V
TTHYS
--
0.1
--
Oscillator
Free Running Frequency
f
OSC
R
RT
= 20k
Ω
180
200
220
kHz
Frequency Adjustable Range
f
OSC_ADJ
50
--
400
kHz
Ramp Amplitude
Δ
V
OSC
R
RT
= 20k
Ω
--
1.9
--
V
Ramp Valley
V
RV
0.7
1.0
--
V
Maximum On-Time of Each Channel
Three Phase Operation
62
67
72
%
RT Pin Voltage
V
RT
R
RT
= 20k
Ω
0.9
1.0
1.1
V
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