ML4830CS 查看數據表（PDF） - Micro Linear Corporation
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ML4830CS Datasheet PDF : 15 Pages
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ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER
OVP/Inhibit Comparator (Pin 11)
OVP Threshold
Hysteresis
Input Bias Current
Propagation Delay
Shutdown Threshold
Shutdown Hysteresis
PWM Comparator (PWM Mode)
Start Period Duty Cycle
Outputs
Output Voltage Low
Output Voltage High
Output Voltage Low in UVLO
Output Rise/Fall Time
Under-Voltage Lockout and Bias Circuits
IC Shunt Voltage (VCCZ)
VCCZ Load Regulation
VCCZ Total Variation
Start-up Current
Operating Current
Start-up Threshold
Shutdown Threshold
Shutdown Temperature (TJ)
Hysteresis (TJ)
CONDITIONS
IOUT = 20mA
IOUT = 200mA
IOUT = –20mA
IOUT = –200mA
IOUT = 10mA, VCC = 8V
CL = 1000pF
ICC = 25mA
25mA < ICC < 68mA
Load, Temp
VCC - 12.3V
VCC = VCCZ – 0.5V
ML4830
MIN
TYP
MAX
UNITS
4.87
5.0
5.13
V
0.5
V
-0.3
–2
µA
500
ns
6.36
6.7
7.04
V
0.7
1.2
1.7
V
40
50
60
%
0.4
0.8
V
2.1
3.0
V
VCC – 2.5 VCC – 1.9
V
VCC – 3.0 VCC – 2.2
V
0.8
1.5
V
50
ns
12.8
13.5
14.2
V
150
300
mV
12.4
14.6
V
1.3
1.7
mA
15
19
mA
VCCZ – 0.5
V
VCCZ – 3.5
V
120
°C
30
°C
FUNCTIONAL DESCRIPTION
OVERVIEW
The ML4830 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 control section can be set
up to adjust lamp power using either Pulse Width (PWM)
or frequency modulation (FM). Either non-overlapping or
overlapping conduction can be selected for the FM mode.
This allows for the IC to be used with a variety of different
ouput networks.
POWER FACTOR SECTION
The ML4830 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 ML4830 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.
5
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