Advance Data Sheet
October 1994
TW050AB DiskPower Converter
Features
I
Small—Business
Card Size
2.0 in. x 3.5 in. x 0.625 in.
50.8 mm x 88.9 mm x 15.9 mm
Low output noise
Economical open-frame construction
Automated assembly with all surface-mount
construction offers high reliability and consistency
Input and outputs are electrically isolated
2:1 input voltage range
Remote on/off
Overtemperature protection
I
I
I
I
TW050AB DiskPower Converter.
I
I
I
I
UL*
1950,
CSA
†
22.2-950, and EN60950
approvals are pending
Applications
I
Distributed power for disk drives and other mass
storage devices
Description
The TW050AB DiskPower converter is designed to power large-capacity disk drives and other mass storage
devices. It is ideal for implementing distributed power systems in disk array systems.
The module operates with input voltages from 36 Vdc to 72 Vdc and provides two outputs: 5 Vdc and 12 Vdc.
Each output is independently regulated. The output ripple and noise are very low. The 12 V output supports
surge currents up to 3.5 A in order to spin-up large disk drives.
Other features include overvoltage protection and current limiting on each output and a remote on/off input.
The module offers a very low failure rate and reliability ten times better than the disk drives begin powered.
*
UL
is a registered trademark of the Underwriters Laboratories, Inc.
†
CSA
is a registered trademark of the Canadian Standards Association.
TW050AB DiskPower Converter
36 Vdc to 75 Vdc Input, 5.0/3.3 Vdc Output; 16 A
Advance Data Sheet
October 1994
Absolute Maximum Ratings
Stresses in excess of the Absolute Maximum Ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to Absolute Maximum Ratings for
extended periods can adversely affect device reliability.
Parameter
Input Voltage Continuous
Operating Ambient Temperature
Storage Temperature
Symbol
V
I
T
A
T
stg
Min
0
0
–40
Max
72
50
85
Unit
Vdc
°C
°C
Electrical Specifications
Unless otherwise indicated, specifications apply over operating input voltage, resistive output loading, and temper-
ature conditions for the life of the module.
Table 1. Input specifications
Parameter
Operating Input Voltage (V
I,nom
= 48 Vdc)
Maximum Input Current:
Steady State (V
I
= V
I,min
to V
I,max
; I
O
= I
O,max
)
During Spin-up Surge (V
I
= V
I,min
to V
I,max
;
I
O1
= I
O1,max
; I
O2
= I
O2,surge
)
Start-up Current (V
I
= V
UVLO,min
; I
O
= I
O,max
)
Inrush Transient
Input Reflected Ripple Current
(5 Hz to 20 MHz; 12 µH source impedance;
T
A
= 25 °C; see Figure 1 and Design
Considerations section.):
Peak-to-Peak
RMS
Input Ripple Rejection (120 Hz)
Symbol
V
I
I
I
I
I
I
I
I
2t
Min
36
—
—
—
—
Typ
48
1.2
1.6
1.9
0.01
Max
72
1.35
1.75
2.0
—
Unit
Vdc
A
A
A
A
2
S
—
—
—
—
—
—
100
—
60
—
100
—
mA p-p
mA rms
dB
CAUTION: The power module is not internally fused. An input fuse must always be used. See Safety
Requirements in the Design considerations section.
2
Tyco Electronics Corp.
Advance Data Sheet
October 1994
TW050AB DiskPower Converter
36 Vdc to 75 Vdc Input, 5.0/3.3 Vdc Output; 16 A
Electrical Specifications
(continued)
Table 2. Output Specifications
Parameter
Output Voltage
(Over all operating input voltage, resistive load, and
temperature until the end of life)
Output Voltage Set Point
(V
I
= V
I,nom
; I
O
= I
O,max
; T
A
= 25°C)
Output Voltage Regulation (Unless otherwise
specified V
I
= V
I,nom
; I
O
= I
O,max
; T
A
= 25 °C):
Line (V
I,min
to V
I,max
)
Load (I
O1
= I
O1,min
to I
O1,max
)
Load (I
O2
= I
O2,min
to I
O2,max
)
Temperature (T
A
= 0 °C to 50 °C)
Output Ripple and Noise
(5 Hz to 20 MHz; see Figure 2.)
Output Current (See Start-up Surge in Design
Considerations section.)
Efficiency (V
I
= V
I,nom
; I
O
= I
O,max
; T
A
= 25 °C;
see Figure 3.)
Dynamic Response (V
O1
)
(∆I
O
/∆t = 100 mA / µs; V
I
= V
I, nom
; T
A
= 25 °C):
Load change from 25% to 50% or 50% to
75% of I
O, max
:
Peak Deviation
Settling Time (V
O
within 10% of the peak
deviation of the final voltage)
Load change from 75% to 50% or 50% to
25% of I
O, max
:
Peak Deviation
Settling Time (V
O
within 10% of the peak
deviation of the final voltage)
Dynamic Response (V
O2
)
(∆I
O
/∆t = 100 mA / µs; V
I
= V
I, nom
; T
A
= 25 °C):
Load change from 10% to 60% or 50% to
100% of I
O, max
:
Peak Deviation
Settling Time (V
O
within 10% of the peak
deviation of the final voltage)
Load change from 100% to 50% or 60% to
10% of I
O, max
:
Peak Deviation
Settling Time (V
O
within 10% of the peak
deviation of the final voltage)
Symbol
V
O1
V
O2
V
O1,set
V
O2,set
Min
4.85
11.64
4.95
11.88
Typ
—
—
5.05
12.12
Max
5.25
12.60
5.15
12.36
Unit
Vdc
Vdc
Vdc
Vdc
—
—
—
—
∆V
01
∆V
02
I
01
I
02
I
02, surge
η
—
—
—
—
—
—
0.0
0.0
—
77
0.3
0.3
0.3
25
—
—
—
—
—
80
—
—
—
—
50
60
1.5
2.5
3.5
—
%
%
%
mV
mVpk-pk
mVpk-pk
A
A
A
%
—
—
—
—
50
1
—
—
mV
ms
—
—
—
—
50
1
—
—
mV
ms
—
—
—
—
120
1
—
—
mV
ms
—
—
—
—
120
1
—
—
mV
ms
Tyco Electronics Corp.
3
TW050AB DiskPower Converter
36 Vdc to 75 Vdc Input, 5.0/3.3 Vdc Output; 16 A
Advance Data Sheet
October 1994
Electrical Specifications
(continued)
Table 2. Output Specifications
(continued)
Parameter
Output Capacitance Loading
(external to the DiskPower Converter):
12 V Output
5 V Output
Symbol
Min
Typ
Max
Unit
C
OUT
ESR
C
OUT
ESR
—
25
—
50
—
—
—
—
5,000
—
2,500
—
µF
mΩ
µF
mΩ
Table 3. Isolation Specifications
Parameter
Isolation Voltage
Isolation Capacitance
Isolation Resistance
Min
500
—
10
Typ
—
4
—
Max
—
—
—
Unit
Vdc
nF
MΩ
Environmental Specifications
Parameter
Airflow Requirements (T
A
= 50 °C; I
O
= I
O, max
;
see Thermal Considerations in Design
Considerations section.):
Airflow Across the Short Dimension of the
DiskPower Converter
Airflow Across the Long Dimension of the
DiskPower Converter
Humidity (non-condensing)
Altitude (from mean sea level)
Min
Typ
Max
Unit
100(0.5)
200(1.0)
5
–200(–60)
—
—
—
—
—
—
95
8000(2500)
Ifm(m/s)
Ifm(m/s)
% RH
ft(m)
General Specifications
Parameter
Weight
Min
—
Typ
2(57)
Max
2.5(71)
Unit
oz.(g)
4
Tyco Electronics Corp.
Advance Data Sheet
October 1994
TW050AB DiskPower Converter
36 Vdc to 75 Vdc Input, 5.0/3.3 Vdc Output; 16 A
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltages, resistive output loads, and tem-
perature conditions over the life of the product. See Design Considerations and Feature Descriptions for further
information.
Parameter
Output current Limit Inception
Output Overvoltage Shutdown
Input Undervoltage Lockout
(Input voltage at which the DiskPower
Converter turns on and off)
ON/OFF Signal Interface (See Feature
Descriptions section and Figure 4.):
Logic Low—Module On:
I
ON/OFF(I
O
)
= 4 mA
V
ON/OFF(I
O
)
= 0.0 Vdc
Logic High—Module Off:
I
ON/OFF(hi)
= 0.0 µA
V
ON/OFF(hi)
= 18 Vdc
12 V Output Turn-on Delay and Rise Times
(See Feature Descriptions section and
Figure 5.):
Case 1: ON/OFF Input Held Low and
then Input Power is Applied
Case 2: Input Power is Applied for at
Least 1 s, then the ON/OFF Input is
Pulled Low
Output Voltage Rise Time
5 V Output Turn-on Delay And Rise Times
(See Feature Descriptions.):
Delay Time from 12 V Output in
Regulation Until 5 V Output is in
Regulation
Output Voltage Rise Time
Symbol
I
O1,OC
I
O2,OC
V
OV1
V
OV2
V
UVLO
Min
—
—
5.40
12.75
25
Typ
1.9
5.6
—
—
30
Max
2.3
6.5
6.00
14.0
35
Unit
A
A
V
V
Vdc
I
ON/OFF(I
O
)
V
ON/OFF(I
O
)
I
ON/OFF(hi)
V
ON/OFF(hi)
—
—
—
—
—
—
15
—
2.0
5
18
20
Vdc
mA
Vdc
µA
T
delay
T
delay
50
0
100
0.1
400
5
ms
ms
T
rise
0.1
2
3
ms
T
delay
0
0.5
5
ms
T
rise
0.1
0.5
3
ms
Tyco Electronics Corp.
5
Microchip MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
