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參數(shù)資料
| 型號： | AT1780M-GRE |
| 廠商： | Aimtron Technology Corp. |
| 英文描述： | 640kHz/1.2MHz,Low-Noise Step-Up Current-Mode PWM Controller |
| 中文描述： | 640kHz/1.2MHz，低噪聲升壓型電流模式PWM控制器 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 336K |
| 代理商： | AT1780M-GRE |
AT1780
Preliminary Product Information
640kHz/1.2MHz,Low-Noise Step-Up
Current-Mode PWM Controller
Electrical Characteristics
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:
http://www.aimtron.com.tw
3/24/06 REV 1.1 Email:
service@aimtron.com.tw
4
(VIN =
SHDN
= 3V, FREQ = GND, TA =0
℃
to +85
℃
, unless otherwise noted. Typical values are at TA = +25
℃
.)
Values
Parameter
Symbol
Condition
Min. Typ. Max.
2.6
Unit
Input Supply Range
V
IN
V
IN
rising, typical
hysteresis is 40mV,LX
remains off below this
level
V
FB
= 1.3V, not
switching
V
FB
= 1.0V, switching
5.5
V
VIN
Lockout
Undervoltage
UVLO
2.1
2.3
2.5
V
0.218 0.35
Quiescent Current
I
IN
2.045
5
mA
Entire device
Shutdown Supply
Current
I
IN
/SHDN = GND
0.1
10
μ
A
Feedback Voltage
V
FB
Level to produce
V
COMP
= 1.24V
VFB = 1.25V
Level to produce
V
COMP
= 1.24V,
2.6V < V
IN
< 5.5V
Δ
I = 5μA
1.222 1.24 1.258
V
FB Input Bias Current
I
FB
0
40
nA
Feedback-Voltage Line
Regulation
0.05 0.15 %/V
Transconductance
Voltage Gain
gm
Av
140
500
μ
mhos
V/V
Error amplifier
--
FSLC = GND
FSLC = IN
FSLC = GND
FSLC = IN
V
FB
= 1V, duty cycle =
65%
I
LX
= 1.2A
540
79
91.3
82.1
740
Frequency
fosc
92
Sawtooth wave
oscillator (OSC)
Maximum Duty Cycle
DC
%
Current Limit
I
LIM
1.2
1.6
2.3
A
On-Resistance
R
ON
I
LXOFF
0.21
0.5
Ω
μ
A
Leakage Current
V
LX
= 12V
0.01
20
N-CHANNEL
SWITCH
Current-Sense
Transresistance
Reset Switch
Resistance
Charge Current
R
CS
0.3
0.45 0.65 V/A
100
Ω
SOFT-START
V
SS
= 1.2V
/SHDN, FREQ;
V
IN
= 2.6V to 5.5V
/SHDN, FREQ;
V
IN
= 2.6V to 5.5V
SHDN, FREQ
1.5
4
7
μ
A
Input Low Voltage
V
IL
0.4
V
Input High Voltage
V
IH
1.6
V
Hysteresis
FSLC Pull-Down
Current
/SHDN Input Current
100
mV
I
FSLC
1.5
5
9
μ
A
CONTROL INPUTS
I
SHDN
0.001
1
μ
A
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