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參數(shù)資料
| 型號： | RT9241A |
| 文件頁數(shù)： | 2/18頁 |
| 文件大?。?/td> | 333K |
| 代理商： | RT9241A |
RT9241A/B
www.richtek.com
2
DS9241AB-01 October 2002
Absolute Maximum Ratings
z
Supply Voltage
7V
GND-0.3V ~ V
DD
+0.3V
z
Input, Output or I/O Voltage
z
Power Dissipation, P
D
@ T
A
= 25
°
C
SOP-20
0.625W
z
Package Thermal Resistance
SOP-20,
θ
JA
z
Ambient Temperature Range
110
°
C /W
0
°
C ~ 70
°
C
0
°
C ~ 125
°
C
-40
°
C ~ 150
°
C
260
°
C
z
Junction Temperature Range
z
Storage Temperature Range
z
Lead Temperature (Soldering, 10 sec.)
Electrical Characteristics
(V
DD
= 5V, GND = 0V, T
A
= 25
°
C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
V
DD
Supply Current
Nominal Supply Current
I
DD
PWM 1,2 Open
--
4
10
mA
Power-On Reset
V
DD
Rising Threshold
4.2
4.35
4.6
V
V
DD
Falling Threshold
Hysteresis
--
3.85
--
V
0.2
0.6
--
V
V
DVD
Rising Trip Threshold
Oscillator
1.19
1.25
1.31
V
RT9241A
170
200
230
Frequency
RT9241B
For each phase
85
100
115
kHz
Ramp Amplitude
--
1.7
--
V
Ramp Valley
1.0
1.3
--
V
Maximum On Time of Each Channel
70
75
80
%
Reference and DAC
DACOUT Voltage Accuracy
-1.0
--
+1.0
%
DAC (VID0-VID4) Input Low Voltage
--
--
0.8
V
DAC (VID0-VID4) Input High Voltage
2.0
--
--
V
DAC (VID0-VID4) Bias Current
20
28
36
μ
A
PWM Controller Error Amplifier
DC Gain
--
85
--
dB
Bandwidth
--
10
--
MHz
Slew Rate
C
L
= 10pF
--
5
--
V/
μ
S
To be continued
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