LT8310_15 Datasheet, PDF (36/36 Pages) Linear Technology – 100VIN Forward Converter Controller

LT8310
Typical Application
94% Efficient, 150W Isolated Synchronous Forward Converter
V_IN
36V TO 72V
V_INTVCC
– V_IN
C1
4.7µF
100V
×4
4.7µF
16V
3.9nF
T1
8:4
••
L1
8µH
D1 ^20k
86.6k
1µF
100V
3.9nF
68pF
UVLO V_IN
1.74k
1.43k
OVLO
LT8310
GATE
M2
390pF
250V
M3
M1
178Ω
178Ω
FG
FB
CSP
FSW
CG
CSW
LT8311
CSN
V_IN
121k
INTV_CC
RDVIN
SENSE
GND
R_SENSE
0.012Ω
DFILT
220pF
NC SYNC
RT
SS
40.2k
249kHz
0.47µF
SOUT
V_C FBX
V_INTVCC
90.9k
T2
1.25:1
••
100pF _499Ω
20k
10k
62k
1µF _4k
PS2801-1
SYNC
PGOOD
COMP
22nF
OPTO
INTVCC
PMODE
SS TIMER GND
4k
3.3k
499k
22nF
100k
4.7µF
560Ω
D1: CENTRAL SEMI CMMR1U-02
L1: CHAMPS HRPQI2050-08
M1: INFINEON BSC320N20NS3G
M2: INFINEON BSC042NE7NS3
M3: FAIRCHILD SEMI FDMS86101DC
T1: PULSE PA0423
T2: PULSE PA3493NL
47µF ⁺
×2
100k
11.3k
V_OUT
2.2µF
8310 TA06a
V_OUT
12V
470µF ^{0A TO 12.5A}
–V_OUT
Related Parts
PART NUMBER
LT3752/LT3752-1
LT3753
LT8311
LTC^®3765/LTC3766
LTC3723-1/LTC3723-2
LTC3721-1/LTC3721-2
LTC3722/LTC2722-2
LT3748
LT3798
LTC3900
LT4430
DESCRIPTION
Active Clamp Synchronous Forward Controllers with Internal
Housekeeping Controller
Active Clamp Synchronous Synchronous Forward Controller
Preactive Secondary-Side Synchronous Forward Controller
Synchronous No-Opto Forward Controller Chip Set with
Active Clamp Reset
Synchronous Push-Pull and Full-Bridge Controllers
Nonsynchronous Push-Pull and Full-Bridge Controllers
Synchronous Full-Bridge Controllers
100V Isolated Flyback Controller
Off-Line Isolated No-Opto Flyback Controller with Active PFC
Synchronous Rectifier N-Channel MOSFET Driver for
Forward Converters
Secondary-Side Optocoupler Driver with Reference Voltage
COMMENTS
Input Voltage Range: LT3752: 6.5V to 100V, LT3752-1: Limited
Only by External Components
Input Voltage Range: 8.5V to 100V
Optimized for Use with Primary-Side LT3752/-1, LT3753 and
LT8310 Controllers
Direct Flux Limit™, Supports Self-Starting Secondary Forward
Control
High Efficiency with On-Chip MOSFET Drivers, Adjustable
Synchronous Rectification Timing
Minimizes External Components, On-Chip MOSFET Drivers
Adaptive or Manual Delay Control for Zero Voltage Switching,
Adjustable Synchronous Rectification Timing
5V ≤ V_IN ≤ 100V, No-Opto Flyback , MSOP-16 with High Voltage
Spacing
V_IN and V_OUT Limited Only by External Components
Programmable Timeout and Reverse-Inductor Protection,
Transformer Synchronization, SSOP-16
Overshoot Control Prevents Output Overshoot During Start-up
and Short-Circuit Recovery
36 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_F3_o5_r -_m7_o4_r1_e7_{information www.linear.com/LT8310}
[phone] ^● FAX: [phone] ^● www.linear.com/LT8310
8310f
LT 0814 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2014