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參數(shù)資料
| 型號： | RT9226B |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SYNCHRONOUS PWM STEP-DOWN DC/DC CONVERTER CONTROLLER |
| 中文描述： | 同步PWM降壓直流/直流轉(zhuǎn)換控制器 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 139K |
| 代理商： | RT9226B |
RT9226B
Preliminary
www.richtek-ic.com.tw
2
DS9226B-01 May 2001
Absolute Maximum Ratings
z
Supply Voltage
15V
GND–0.3V to Vcc+0.3V
0
°
C to 70
°
C
0
°
C to 125
°
C
65
°
C to 150
°
C
z
Input, Output or I/O Voltage
z
Ambient Temperature Range
z
Operating Junction Temperature Range
z
Storage Temperature Range
z
Package Thermal Resistance
SOP-14,
θ
JA
z
Lead Temperature (Soldering, 10 sec.)
160
°
C/W
300
°
C
Electrical Characteristics
(VCC
= 12V, GND = 0V, T
A
= 25
°
C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VCC Supply Current
Nominal Supply Current
I
CC
UGATE Open
--
3
--
mA
Power-On Reset
VCC Rising Threshold
V
OCSET
= 4.5V
--
9.5
--
V
VCC Falling Threshold
V
OCSET
= 4.5V
--
7.5
--
V
Enable Input Threshold
V
EN
0.2
--
2.2
V
Oscillator
Frequency
170
200
230
KHz
Ramp Amplitude
V
OSC
--
1.9
--
V
Internal Voltage Reference
Reference Voltage
V
REF
0.785
0.800
0.815
V
PWM Controller Error Amplifier
DC Gain
--
65
--
dB
PWM Controller Gate Driver
UGATE Source
R
UGATE
I
UGATE
= 0.3A
--
8
--
UGATE Sink
R
UGATE
I
UGATE
= 0.3A
--
6
--
LGATE Source
I
LGATE
V
CC
= 12V, V
LGATE
= 6V
--
500
--
mA
LGATE Sink
R
LGATE
I
LGATE
= 1V
--
5
--
Protection
OCSET Current Source
I
OCSET
V
OCSET
= 4.5V
170
200
230
μ
A
Soft-start Current
I
SS
V
SS
= 1.5V
--
10
--
μ
A
Over-voltage Trip (VSEN/VREF)
--
115
120
%
Power Good
Upper Threshold (VSEN/VREF)
--
108
--
%
Lower Threshold (VSEN/VREF)
--
92
--
%
PGOOD Voltage Low
V
PGOOD
I
PGOOD
= -5mA
--
0.5
--
V
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