LT1952-1 Linear Technology, LT1952-1 Datasheet - Page 24

• Manufacturer Part Number: LT1952-1
• Description: Single Switch Synchronous Forward Controller
• Manufacturer: Linear Technology

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LT1952/LT1952-1
PACKAGE DESCRIPTION
RELATED PARTS
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
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 Rectifi er Controller
General Purpose Isolated Flyback Controller
Single Switch Forward Controller
SOT-23 Flyback Controller
Synchronous Flyback Controller
Synchronous Rectifi er Driver for
Forward Converters
.254 MIN
.0165 .0015
RECOMMENDED SOLDER PAD LAYOUT
●
FAX: [phone]
(0.406 – 1.270)
.016 – .050
(MILLIMETERS)
INCHES
●
www.linear.com
.150 – .165
.045 .005
0° – 8° TYP
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641 Rev B)
(0.38 0.10)
.015 .004
.0250 BSC
× 45°
GN Package
COMMENTS
High Effi ciency 2-Switch Forward Control
Use for Isolated Power Supplies, Contains Voltage Margining, Optocoupler
Driver, Synchronization Circuit with the Primary Side, Error Amplifi er
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 Effi ciency Push-Pull PWM
Adjustable Slope Compensation, Internal Soft-Start, 200kHz
Excellent Cross Regulation, High Effi ciency, Multiple Outputs
Use for Isolated Power Supplies, 4.5V ≤ V
Synchronous MOSFET Driver, Programmable Timeout, Reverse Inductor
Current Sense, 16-pin SSOP
(5.817 – 6.198)
(0.203 – 0.305)
.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
IN
(0.102 – 0.249)
8
.004 – .0098
≤ 11V, N-channel
(3.810 – 3.988)
.150 – .157**
GN16 (SSOP) 0204
(0.229)
LT 1108 REV D • PRINTED IN USA
.009
REF
19521fd