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參數(shù)資料
| 型號(hào)： | ML4831 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Electronic Ballast Controller(電子整流器控制器) |
| 中文描述： | 電子鎮(zhèn)流器控制器（電子整流器控制器） |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 165K |
| 代理商： | ML4831 |
ML4831
5
ELECTRICAL CHARACTERISTICS
(Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
OVP Comparator (Pin 18)
OVP Threshold
2.6
2.7
2.8
V
Hysteresis
0.25
V
Propagation Delay
500
ns
Outputs
Output Voltage Low
I
OUT
= 20mA
I
OUT
= 200mA
I
OUT
= –20mA
I
OUT
= –200mA
I
OUT
= 10mA, V
CC
= 8V
C
L
= 1000pF
0.4
0.8
V
2.1
3.0
V
Output Voltage High
V
CC
– 2.5
V
CC
– 3.0
V
CC
– 1.9
V
CC
– 2.2
0.8
V
V
Output Voltage Low in UVLO
1.5
V
Output Rise/Fall Time
50
ns
Under-Voltage Lockout and Bias Circuits
IC Shunt Voltage (V
CCZ
)
V
CCZ
Load Regulation
V
CCZ
Total Variation
Start-up Current
I
CC
= 25mA
25mA < I
CC
< 68mA
Load, Temp
12.8
13.5
14.2
V
150
300
mV
12.4
14.6
V
V
CC
≤
12.3V
V
CC
= V
CCZ
– 0.5V
1.3
1.7
mA
Operating Current
15
19
mA
Start-up Threshold
V
CCZ
– 0.5
V
CCZ
– 3.5
120
V
Shutdown Threshold
V
Shutdown Temperature (T
J
)
Hysteresis (T
J
)
°
C
30
°
C
FUNCTIONAL DESCRIPTION
OVERVIEW
The ML4831 consists of an Average Current controlled
continuous boost Power Factor front end section with a
flexible ballast control section. Start-up and lamp-out retry
timing are controlled by the selection of external timing
components, allowing for control of a wide variety of
different lamp types. The ballast section controls the lamp
power using frequency modulation (FM) with additional
programmability provided to adjust the VCO frequency
range. This allows for the IC to be used with a variety of
different output networks.
POWER FACTOR SECTION
The ML4831 Power Factor section is an average current
sensing boost mode PFC control circuit which is
architecturally similar to that found in the ML4821. For
detailed information on this control architecture, please
refer to Application Note 16 and the ML4821 data sheet.
GAIN MODULATOR
The ML4831 gain modulator provides high immunity to
the disturbances caused by high power switching. The
rectified line input sine wave is converted to a current via
a dropping resistor. In this way, small amounts of ground
noise produce an insignificant effect on the reference to
the PWM comparator.
The output of the gain modulator appears on the positive
terminal of the IA amplifier to form the reference for the
current error amplifier. Please refer to Figure 1.
[
V
ISINE
(
VEA
mA
V
MUL
≈
×
4 17
]
)
(
.
)
.
1 1
(1)
where:
I(SINE) is the current in the dropping resistor,
V(EA) is the output of the error amplifier (Pin 1).
The output of the gain modulator is limited to 1.0V.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML483-1 | 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR 136KG 4" SWIVEL/BRAK 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC, For Use With:Industrial and Material Handling Applications, Carrying Capacity:136kg, Wheel Diameter:100mm , RoHS Compliant: NA |
| ML4831CP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML483-1W | 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR 136KG 4" SWIVEL/BRAK 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC, For Use With:Industrial and Material Handling Applications, Carrying Capacity:136kg, Wheel Diameter:100mm , RoHS Compliant: NA |
| ML4832 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Electronic Dimming Ballast Controller |
| ML4832CP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
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