with Supervisor. HV9606 Datasheet

HV9606 Supervisor. Datasheet pdf. Equivalent

Part HV9606
Description HV9606 Current-Mode PWM Controller with Supervisor
Feature HV9606 Initial Release HV9606 Current-Mode PWM Controller with Supervisor Features Synchronous Forw.
Manufacture Supertex Inc
Datasheet
Download HV9606 Datasheet




HV9606
HV9606
Initial Release
HV9606 Current-Mode PWM Controller with Supervisor
Features
Synchronous Forward, Forward, and Flyback Controller
Lowest External Parts Count, Smallest Magnetics
Eliminates Bootstrap Transformer Winding
Supervisor Circuit Reduces Output Capacitance* up to 40%
Supervisor Circuit Functions as µP Supply Monitor and POR
15V to 250V Start-Up Regulator with START/STOP Control
<1mA Operating, <6µA Standby Input Current
VDD Powered Operation down to 2.9V
Charge Pump Gate Drive Supply
Programmable Soft Start
Under Voltage Lockout with Programmable Hysteresis
<50% Duty Cycle Operation
15kHz to 400kHz Fixed Frequency PWM Operation
Fault Tolerant Peer-to-Peer Synchronization
Precision !1% Band Gap Voltage Reference
Current Sense Leading Edge Blanking
Small SSOP-20 Footprint
*For short duration line loss, supervisor disables soft start if output
within tolerance when VIN returns and thus reduces holdup
requirements.
Applications
Powered Ethernet and VoIP Terminals
Cable Modems and Amplifiers
ISDN Network Terminations, Terminals and Adapters
Network Equipment
Servers, PCs and Peripheral Equipment
Telecommunication Systems and Terminals
Distributed Board Mounted Power
Battery Backup Systems
Portable Power Applications
Automotive and Heavy Equipment
General Description
The HV9606 PWM controller allows the design of high efficiency
(>90%) power supplies for distributed board mounted power (BMP)
applications. Due to its high frequency capability it can provide
high currents (20A @ 3.3V) with small transformers and due to its
low internal operating voltage and current is also able to achieve
high efficiencies in low power applications.
The HV9606 utilizes fixed frequency current mode control with duty
cycle internally limited to <50%. It supports both isolated and non-
isolated topologies and provides all the necessary functions to
implement a flyback, forward or synchronous forward converter
with a minimum of external parts. Due to its low VDD operation the
bootstrap magnetic winding is eliminated in non-isolated
topologies. An on chip charge pump generates the gate drive
voltage for driving an external N-channel MOSFET and eliminates
the need for clamping by offering 250V immunity to high voltage
transients common in telecom and network systems. It conforms
to the requirements of IEEE 802.3 Powered Ethernet and ETR-080
ISDN specifications.
The oscillator is programmable and provides fault tolerant peer-to-
peer synchronization to other similar circuits or master clock. The
chip draws almost no current (<6µA @ VIN < 20V) until the
programmable START/STOP thresholds of the start-up regulator
are satisfied. It can also be powered via the VDD pin, rather than
the VIN pin, in the range of 2.9V to 5.5V.
Other functions include leading edge current sense blanking,
programmable SOFT START, precision !1% band gap reference
and a SUPERVISOR CIRCUIT. The SUPERVISOR can provide
housekeeping functions such as µP supply monitoring and reset,
soft start inhibit for rapid restart on short duration input voltage
interruption. It also minimizes input and output capacitance
requirements.
Typical Application Circuit
+48V
GND
R3
R2
R1
C1
10W Non-Isolated 48V to 3.3V Flyback Converter
C2
C4
C3
R4
1 VDD
2 START
3 STOP
4 Vin
5 REF
6 SS
7 SYNC
8 RT
9 SGND
10 PGND
STATUS 20
SENSE 19
FB
COMP
18
C7
17
NI 16
CA 15
CB 14
VX2 13
GATE 12
CS 11
C9
C8
R6
C6
C5
T1
M1
R5
D1
R7
R8
R9
To SYNC pin of other HV9606 PWMs.
To uP
RESET
Q1 Pin.
+3.3V
C10
R10
GND
1 4/15/2002-R.L2
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com



HV9606
Electrical Characteristics (-40°C TA +85°C unless otherwise noted)
Symbol
Parameter
Min Typ Max
Units
HV9606
Conditions
Pre-Regulator/Start-up
VIN Regulator input voltage
IIN Input leakage current
IIN Input leakage current
VDD(REG)
Regulator output voltage
UVLOVDD
VDD Under voltage lockout threshold
UVLOVDD
VDD Under voltage lockout hysteresis
15 250 V
6 µA VIN 20V, Start = 0V, Stop = 0V
50 µA VIN = 250V
2.8 2.9 3.0
V Vin < 120V
2.7 2.8 2.9
V VDD rising
100 200 mV
Supply (Test Condition: 0.1µF CA to CB and 0.1µF VX2 to PGND)
VDD Operating range
2.9
IDD Supply current
VVX2 Gate drive charge pump supply
1.8xVDD
UVLOVX2
VX2 Under voltage lockout threshold
4.5
UVLOVX2
VX2 Under voltage lockout hysteresis
1.0
0.4
Start/Stop Control
VSTART
Start threshold
VSTOP(MAX)
Maximum voltage
VSTOP
Stop threshold
ISTART
Start input current
ISTOP
Stop input current
6.44 7.00
6.44 7.00
MOSFET Driver Output (Test condition: VVX2 = 5V)
VGATE(HIGH) Output high voltage
VVX2-0.2
VGATE(LOW)
Output low voltage
tR Rise time
tF Fall time
30
30
5.5
1.5
7.56
13
7.56
50
50
0.15
50
50
V
mA GATE open, fOSC = 50 kHz, VDD = 3.3V
V
V
V
V VIN rising
V
V VIN falling, VSTART = 0V
nA 6.44V VSTART 7.56V, VSTOP is open
nA 6.44 VSTOP 7.56V, VSTART to 10V via 10k
V
V
nSec
nSec
IGATE = 10mA
IGATE = -10mA
CLOAD = 250pF
CLOAD = 250pF
Oscillator
fOSC Initial accuracy
fOSCRANGE
Oscillator Frequency Range
TC Temperature coefficient
f/f Voltage stability
10 %
30 800 kHz
100 300 PPM/ºC fOSC = 100 kHz
1 2 % fOSC = 100 kHz, 2.9V VDD 5.5V
SYNC
IOSYNC
IISYNC
IVSYNC
Sync output current
Sync input current
Sync input voltage absolute limits
10 20 µA
10 mA VSYNC < 0.1 Volt
-0.5
VDD+0.5
V
PWM
FPWM
PWM Oscillation Frequency
15 400 kHz FPWM = fOSC/2, Stability as fOSC above
DMAX
Maximum duty cycle
49.99
% fOSC = 30kHz
DMAX
Maximum duty cycle
49
% fOSC = 800kHz
DMIN Minimum pulse width before pulse drop out
130 195 nSec VDD = 3.3V
DMIN
Minimum duty cycle
0 % VFB > VNI, VSS > 2V
DMIN
Minimum duty cycle
0 % VFB < VNI, VSS < 0.1V
2 4/15/2002-R.L2
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com







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