Standard temperature range for all parts is industrial (-40° to +85°C).
Features
❏
❏
❏
❏
❏
❏
10 to 120V input range
200V, 5Ω output MOSFET
Current-Mode Control
High Efficiency
CCITT Compatible
Internal Start-up Circuit
General Description
The Supertex HV9105 and HV9108 are high-efficiency high
voltage SMPS ICs intended for use in power converters requiring
extreme efficiency at output power levels of 5.0W or less. The low
supply current (0.5mA max) allows them to be used to build
supplies which meet CCITT I.430 performance recommenda-
tions (60% efficiency at .025W out).
The HV9105/08 provides all the functions necessary to build a
single-switch current-mode converter of any common topology,
with a minimum of external parts.
In addition to high efficiency, because it uses Supertex’s propri-
etary high voltage BiCMOS/DMOS technology, the HV9105/08
offers numerous performance advantages when compared to
conventional PWM ICs. Dynamic range is approximately 8 times
wider than with bipolar ICs, both response speed and maximum
clock rate are faster, and no external power resistors or zeners are
necessary for high voltage starting.
Accessory circuits are included to provide either latching or
nonlatching shutdown. When shut down, device dissipation is
less than 4mW.
The HV9105/08 is intended for operation with input voltages from
10 to 120VDC.
Applications
❏
DC/DC Converters
❏
Distributed Power Systems
❏
ISDN Equipment
❏
PBX Systems
❏
Modems
Absolute Maximum Ratings
+V
IN
, Input Voltage
V
DS
V
DD
, Logic Voltage
Control Inputs
I
D
(Peak)
Storage Temperature
Power Dissipation, Plastic DIP
Power Dissipation, PLCC
120V
200V
15.0V
-0.3V to V
DD
+0.3V
2.5A
-65°C to 150°C
750mW
1400mW
For detailed circuit and application information, please refer
to application notes AN-H13 and AN-H21 to AN-H24.
11/12/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
1
HV9105/HV9108
Electrical Characteristics
(V
DD
= 10V, +V
IN
= 48V, Discharge = -V
IN
= 0V, R
BIAS
= 820KΩ, R
OSC
= 910KΩ,T
A
= 25°C, unless otherwise specified)
Symbol Parameters
Min
Typ
Max
Unit
Conditions
Reference
V
REF
Z
OUT
I
SHORT
∆V
REF
Output Voltage
Output Impedance
1
Short Circuit Current
Change in V
REF
with Temperature
3.92
15
4.00
30
100
0.25
4.08
45
130
V
KΩ
µA
mV/°C
V
REF
= -V
IN
R
L
= 10MΩ
Oscillator
f
MAX
f
OSC
Maximum Oscillator Frequency
Initial Accuracy
2
Voltage Stability
1
Temperature Coefficient
1
170
1.0
32
3.0
40
48
15
MHz
KHz
%
ppm/°C
9.5V < V
DD
< 13.5V
R
OSC
= 0Ω
PWM
D
MAX
Maximum Duty Cycle
1
HV9105
HV9108
Deadtime
1
D
MIN
Minimum Duty Cycle
Minimum Pulse Width
Before Pulse Drops Out
1
110
HV9108
49.0
99.0
49.4
99.4
100
0
175
49.6
99.6
nsec
%
nsec
%
Error Amplifier
V
FB
I
IN
V
OS
A
VOL
gbw
Z
OUT
I
SOURCE
I
SINK
PSRR
Feedback Voltage
Input Bias Current
Input Offset Voltage
Open Loop Voltage Gain
1
Unity Gain Bandwidth
1
Output Impedance
1
Output Source Current
Output Sink Current
Power Supply Rejection
1
50
60
0.5
3.96
4.00
25
nulled at trim
80
0.8
See Fig. 2
-1.3
80
See Fig. 1
-1.0
4.04
500
V
nA
mV
dB
MHz
Ω
mA
µA
V
FB
= 3.4V
V
FB
= 4.5V
V
FB
Shorted to Comp
V
FB
= 4.0V
Current Limit
V
SOURCE
Threshold Voltage
t
d
Delay to Output
1
1.0
1.2
150
1.4
200
V
ns
V
FB
= 0V, R
L
= 100Ω
V
SOURCE
= 1.5V, R
L
= 100Ω
Pre-Regulator/Startup
+V
IN
V
TH
V
LOCK
Allowable Input Voltage
Input Leakage Current
V
DD
Pre-regulator Turn-off
Threshold Voltage
Undervoltage Lockout
7.8
7.0
8.6
8.1
120
10
9.4
8.9
V
µA
V
V
I
IN
= 10µA
V
DD
> 9.4V
I
PREREG
= 10µA
R
L
= 100Ω from Drain to V
DD
Notes:
1. Guaranteed by design. Not subject to production test.
2. Stray capacitance on OSC IN pin
≤5pF.
2
HV9105/HV9108
Electrical Characteristics
(Continued)
(V
DD
= 10V, +V
IN
= 48V, Discharge = -V
IN
= 0V, R
BIAS
= 820KΩ, R
OSC
= 910KΩ,T
A
= 25°C, unless otherwise specified)
Symbol Parameters
Min
Typ
Max
Unit
Conditions
Supply
I
DD
I
BIAS
V
DD
Supply Current
0.35
Bias Current
Operating Range
9.0
7.5
13.5
0.6
mA
mA
µA
V
Shutdown = -V
IN
Logic
t
SD
t
SW
t
RW
t
LW
V
IL
V
IH
I
IH
I
IL
Shutdown Delay Time
1
Shutdown Pulse Width
1
RESET Pulse Width
1
Latching Pulse Width
1
Input Low Voltage
Input High Voltage
Input High Current
Input Low Current
7.0
1.0
-25
5.0
-35
50
50
25
2.0
50
100
ns
ns
ns
ns
V
V
µA
µA
V
IN
= 10V
V
IN
= 0V
V
SOURCE
= -V
IN
MOSFET Switch
BV
DSS
R
DS(ON)
I
DSS
C
DS
Breakdown Voltage
200
240
V
Ω
µA
pF
V
SOURCE
= Shutdown = 0V,
I
D
= 100µA
Drain-to-Source On-resistance
OFF State Drain Leakage Current
Drain Capacitance
35
3.5
5.0
10
V
SOURCE
= 0V, I
D
= 100mA
V
SOURCE
= Shutdown = 0V,
V
DRAIN
= 100V
V
DS
= 25V, Shutdown = 0V
Note:
1. Guaranteed by design. Not subject to production test.
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