LT1952 Linear Technology, LT1952 Datasheet - Page 24

• Manufacturer Part Number: LT1952
• Description: Single Switch Synchronous Forward Controller
• Manufacturer: Linear Technology

RELATED PARTS
PACKAGE DESCRIPTIO
PART NUMBER
LT1681/LT3781
LT1698
LT1725
LT1950
LTC3722-1/LTC3722-2 Dual Mode Phase Modulated Full-Bridge Controllers ZVS Full-Bridge Controllers
LTC3723-1/LTC3723-2 Synchronous Push-Pull PWM Controllers
LTC3803
LTC3806
LTC3900
LT1952
24
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
(0.178 – 0.249)
.007 – .0098
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
DESCRIPTION
Synchronous Forward Controllers
Secondary Synchronous Rectifier Controller
General Purpose Isolated Flyback Controller
Single Switch Forward Controller
SOT-23 Flyback Controller
Synchronous Flyback Controller
Synchronous Rectifier Driver for
Forward Converters
.254 MIN
.0165 ± .0015
●
RECOMMENDED SOLDER PAD LAYOUT
FAX: [phone]
(0.406 – 1.270)
.016 – .050
(MILLIMETERS)
INCHES
U
●
www.linear.com
16-Lead Plastic SSOP (Narrow .150 Inch)
.045 ±.005
.150 – .165
0° – 8° TYP
(0.38 ± 0.10)
.015 ± .004
.0250 BSC
(Reference LTC DWG # 05-08-1641)
× 45°
GN Package
COMMENTS
High Efficiency 2-Switch Forward Control
Use for Isolated Power Supplies, Contains Voltage Margining, Optocoupler
Driver, Synchronization Circuit with the Primary Side, Error Amplifier
Drives External Power MOSFET, Senses Output Voltage Directly from
Primary Side Switching — No Optoisolator Required, 16-pin SSOP
3V ≤ V
Slope Compensation, Low 100mV Sense Threshold, 16-Pin SSOP
High Efficiency Push-Pull PWM
Adjustable Slope Compensation, Internal Soft-Start, 200kHz
Excellent Cross Regulation, High Efficiency, Multiple Outputs
Use for Isolated Power Supplies, 4.5V ≤ V
Synchronous MOSFET Driver, Programmable Timeout, Reverse Inductor
Current Sense, 16-pin SSOP
(0.203 – 0.305)
(5.817 – 6.198)
.229 – .244
.008 – .012
IN
TYP
≤ 25V, 25W to 500W, Adaptive Max Duty Cycle Clamp, Programmable
.0532 – .0688
(1.35 – 1.75)
16 15 14 13
1
2 3
(4.801 – 4.978)
.189 – .196*
4
12 11 10 9
5 6 7
(0.635)
.0250
BSC
© LINEAR TECHNOLOGY CORPORATION 2004
(0.102 – 0.249)
IN
8
.004 – .0098
≤ 11V, N-channel
www.DataSheet4U.com
(3.810 – 3.988)
.150 – .157**
GN16 (SSOP) 0204
LT/TP 0804 1K • PRINTED IN USA
(0.229)
.009
REF
1952f