LinearVoltageRegulators Motorola Semiconductor Products, LinearVoltageRegulators Datasheet - Page 28

• Manufacturer Part Number: LinearVoltageRegulators
• Description: Analog And Interface Integratedcircuits Selector Guide & Cross Reference
• Manufacturer: Motorola Semiconductor Products

Power Factor Controllers
MC34262D, P
T A = 0 to +85 C, Case 751, 626
MC33262D, P
T A = –40 to +105 C, Case 751, 626
controllers specifically designed for use as a preconverter in
electronic ballast and in off–line power converter applications.
These integrated circuits feature an internal startup timer for
stand alone applications, a one quadrant multiplier for near
unity power factor, zero current detector to ensure critical
conduction operation, transconductance error amplifier,
quickstart circuit for enhanced startup, trimmed internal
bandgap reference, current sensing comparator, and a totem
pole output ideally suited for driving a power MOSFET.
85 to 265
ANALOG AND INTERFACE INTEGRATED CIRCUITS
SELECTOR GUIDE & CROSS REFERENCE
The MC34262, MC33262 series are active power factor
Vac
Filter
RFI
0.01
1.3 M
1
12 k
Current Sense
Comparator
MC34262
Delay
Zero Current
Detector
Timer R
Reference
Multiplier
2.5 V
Latch
RS
1.5 V
1.6 V
1.2 V
Overvoltage
Comparator
1.08 V ref
overvoltage comparator to eliminate runaway output voltage
due to load removal, input undervoltage lockout with
hysteresis, cycle–by–cycle current limiting, multiplier output
clamp that limits maximum peak switch current, an RS latch
for single pulse metering, and a drive output high state clamp
for MOSFET gate protection. These devices are available in
dual–in–line and surface mount plastic packages.
10 A
UVLO
0.68
Also included are protective features consisting of an
16 V
Quickstart
6.7 V
Output
Error Amp
Drive
36 V
10 pF
20 k
14 V
V ref
10
10
100 k
100
22 k
1N4934
T
14N50E
0.1
MTP
MUR460
1.6 M
10 k
MOTOROLA
330
400 V/0.44 A
V O
57