ml4822cs Microsemi Corporation, ml4822cs Datasheet

no-image

ml4822cs

Manufacturer Part Number
ml4822cs
Description
Average Current Controller
Manufacturer
Microsemi Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ML4822CS
Quantity:
8
Part Number:
ML4822CS
Quantity:
6
Part Number:
ML4822CS
Manufacturer:
MICROLINEAR
Quantity:
20 000
GENERAL DESCRIPTION
The ML4822 is a PFC controller designed specifically for
high power applications. The controller contains all of the
functions necessary to implement an average current
boost PFC converter, along with a Zero Voltage Switch
(ZVS) controller to reduce diode recovery and MOSFET
turn-on losses.
The average current boost PFC circuit provides high
power factor (>98%) and low Total Harmonic Distortion
(THD). Built-in safety features include undervoltage
lockout, overvoltage protection, peak current limiting, and
input voltage brownout protection.
The ZVS control section drives an external ZVS MOSFET
which, combined with a diode and inductor, soft switches
the boost regulator. This technique reduces diode reverse
recovery and MOSFET switching losses to reduce EMI and
maximize efficiency.
BLOCK DIAGRAM
14
13
4
5
3
6
7
FB
2.5V
I AC
V RMS
I SENSE
R T C T
REF
ZV SENSE
+
MODULATOR
VEAO
VEA
GAIN
1
(Pin configuration shown for 14-pin package)
R+
V CCZ
R–
REF
8
GND
+
IEA
– –
+
ZVS Average Current PFC Controller
2
OSC
IEAO
+
FEATURES
2.7V
–1V
*This Part Is End Of Life As Of August 1, 2000
FB
Average current sensing, continuous boost, leading
edge PFC for low total harmonic distortion and near
unity power factor
Built-in ZVS switch control with fast response for high
efficiency at high power levels
Average line voltage compensation with brownout
control
Current fed gain modulator improves noise immunity
and provides universal input operation
Overvoltage comparator eliminates output “runaway”
due to load removal
UVLO, current limit, and soft-start
Precision 1% reference
+
+
I LIMIT
OVP
R
S
R
S
R
S
Q
Q
Q
Q
Q
V CCZ
13.5V
ML4822*
PWR GND
PFC OUT
ZVS OUT
V CC
May 1997
12
11
10
9
1

Related parts for ml4822cs

ml4822cs Summary of contents

Page 1

GENERAL DESCRIPTION The ML4822 is a PFC controller designed specifically for high power applications. The controller contains all of the functions necessary to implement an average current boost PFC converter, along with a Zero Voltage Switch (ZVS) controller to reduce ...

Page 2

ML4822 PIN CONFIGURATION ML4822 14-Pin DIP (P14) VEAO 1 14 IEAO SENSE RMS SENSE 7 8 TOP VIEW PIN DESCRIPTION (Pin ...

Page 3

ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Shunt Regulator Current (I ) ................................. 55mA CC Peak ...

Page 4

ML4822 ELECTRICAL CHARACTERISTICS PARAMETER ZV SENSE COMPARATOR Propagation Delay Threshold Voltage Input Capacitance GAIN MODULATOR Gain (Note 2) Bandwidth Output Voltage OSCILLATOR Initial Accuracy Voltage Stability Temperature Stability Total Variation Ramp Valley to Peak Voltage Dead Time C Discharge Current ...

Page 5

ELECTRICAL CHARACTERISTICS PARAMETER MOSFET DRIVER OUTPUTS Output Low Voltage Output High Voltage Output Rise/Fall Time UNDERVOLTAGE LOCKOUT Threshold Voltage Hysteresis SUPPLY Shunt Voltage (V ) CCZ Load Regulation Total Variation Start-up Current Operating Current Note 1: Limits are guaranteed by ...

Page 6

ML4822 FUNCTIONAL DESCRIPTION Switching losses of wide input voltage range PFC boost converters increase dramatically as power levels increase above 200 watts. The use of zero-voltage switching (ZVS) techniques improves the efficiency of high power PFCs by significantly reducing the ...

Page 7

Q1 Turn-On The turn-on event consists of the time it takes for the current through L2 to ramp to the L1 current plus the resonant event of L2 and the ZVS capacitor. The total event should occur in a minimum ...

Page 8

ML4822 8 Figure 3. ML4822 Scematic ...

Page 9

PHYSICAL DIMENSIONS 14 PIN 0.070 MIN (1.77 MIN) (4 PLACES) 0.170 MAX (4.32 MAX) 0.125 MIN (3.18 MIN) inches (millimeters) Package: P14 14-Pin PDIP 0.740 - 0.760 (18.79 - 19.31) 0.240 - 0.260 (6.09 - 6.61) 0.050 ...

Page 10

... ORDERING INFORMATION PART NUMBER ML4822CP ML4822CS ML4822IP ML4822IS © Micro Linear 1997 is a registered trademark of Micro Linear Corporation Micro Linear Products described in this document may be covered by one or more of the following patents, U.S.: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; ...

Related keywords