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參數(shù)資料
| 型號： | FAN7544N |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Terminal Block; RoHS Compliant:Yes RoHS Compliant: Yes |
| 中文描述： | 0.6 A FLUORESCENT LIGHT CONTROLLER, 54.5 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 1185K |
| 代理商： | FAN7544N |
2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
Low Start-up and Operating Current : 140
μ
A, 6.5mA
Under Voltage Lock Out With 1.9V of Hysteresis
600mA of Totem Pole Output with High State Clamp
Trimmed 1.5% Internal Bandgap Reference
Programmable Preheat Time & Frequency
Programmable Run Frequency
High Accuracy Oscillator
Descriptions
The FAN7544 provides simple and high performance elec-
tronic ballast control functions. The FAN7544 is optimized
for electronic ballast requiring a minimum board area, by
reducing component counts and lowering power dissipation.
The features include programmable preheating time and fre-
quency and programmable run frequency. The initial pre-
heating time and frequency can be adjusted according to the
types of lamps using the CPH, CT and RPH. Output gate
driver circuit clamps power MOSFET gate voltage to the
supply voltage.
Internal Block Diagram
FAN7544
Simple Ballast Controller
8-DIP
8-SOP
1
1
GND
Latch
1.9V
C
PH
Vcc
R
PH
R
T
OUT1
UVLO
11.6V
1
3
6
4
7
Vcc
Vcc
Frequency
Divider
Q
2
5.2V
1.5V
Oscillator
6.25Ict
Ict
Irt=Vref/Rt
C
T
OUT2
Iph=Vref/Rph
Current
Source
Current
Source
2.9V
2.9V
Irt
5V
Iph - Irt
1
2.1
5V
2V
Shutdown signal
+
Bias
Current
9V Vsup
TSD
+
V
CPH
5V
8
Vz
5
R
Q
S
Q
1
μ
A
1
μ
A
R
S
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