CS5106 Datasheet, PDF (1/12 Pages) Cherry Semiconductor Corporation – Multi-Feature, Synchronous plus Auxiliary PWM Controller

CS5106
Multi-Feature, Synchronous plus Auxiliary
PWM Controller
Description
Features
The CS5106 is a fixed frequency,
current mode controller with one
single NFET driver and one dual
FET, synchronous driver. The syn-
chronous driver allows for
increased efficiency of the main iso-
lated power stage and the single
driver allows the designer to devel-
op auxiliary supplies for controller
power as well as secondary side
house keeping. In addition,
because the synchronous drivers
have programmable FET non-over-
lap, the CS5106 is an ideal con-
troller for soft-switched converter
topologies.
The CS5106 is specifically designed
for isolated topologies where speed,
flexibility, reduced size and
reduced component count are
requirements. The controller con-
tains the following features:
Undervoltage Shutdown,
Overvoltage Shutdown,
Programmable Frequency,
Programmable Synchronous Non-
Overlap Time, Master/Slave
Clocking with Frequency Range
Detection, Enable, Output
Undervoltage Protection with
Timer, 20mA 5V Output, 80ns
PWM propagation delay, and
Controlled Hiccup Mode.
The CS5106 has junction tempera-
ture and supply ranges of -40ûC to
125ûC and 9V to 16V respectively
and is available in the 24 lead SSOP
package.
Applications Diagram
48V to 3.3V Forward Converter with Synchronous Rectifiers
R27
R3
VIN
SYNCIN
ENABLE
R1
R2
C4
C1
R4
C2
VAUXP
D1
VIN
T1
CS5106
UVSD
ENABLE
OVSD PROGRAM
C3
V5REF
SYNC IN
OAM
SYNC OUT
OAOUT
FADJ
OUVDELAY DLYSET
ILIM1
ILIM2
RAMP1
RAMP2
VFB1
VSS
VFB2
GATE2B
VCC
GATE1
GATE2
VDD
VIN
C5 ^D2
R5
R8
Q2
Q1
VAUXS ^{C7 R6}
D6
R9
D3
C9
C10 _R10
R11
R12
SYNCOUT
VAUXP
V5REF
D5
C6 _R7
R24
D8
R15
R20
R16
C14 _R17
R25
C13
R14
C8
TL431
R13
T4
CNY17-4
VAUXS
Q7
R26
VIN
T3
D4
R21
Q6
T2
R23
C11
D7
R22
Q4
Q3
R18
R19
L1
Q5
VMAIN
C12
s Programmable Fixed
Frequency
s Programmable FET Non-
overlap
s Enable Lead
s 12V Fixed Auxiliary
Supply Control
s Under and Overvoltage
Shutdown
s Output Undervoltage
Protection with Timer
s Master/Slave Clock
Syncing Capability
s Sync Frequency Range
Detection
s 80ns PWM Propagation
Delay
s 20mA 5V Reference
Output
s Small 24 lead SSOP
Package
s Controlled Hiccup Mode
Package Options
24 Lead SSOP
UVSD ¹
OVSD
V_5REF
OAM
OAOUT
OUVDELAY
ILIM1
RAMP1
V_FB1
V_SS
V_CC
GATE1
ENABLE
PROGRAM
SYNC_IN
SYNC_OUT
FADJ
DLYSET
I_LIM2
RAMP2
V_FB2
GATE2B
GATE2
V_DD
Rev. 10/27/98
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.cherry-semi.com
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