TI PT4452C

PT4452—24V
100-W 30-A Programmable
Isolated DC/DC Converter
SLTS144A
(Revised 5/28/2002)
Features
• 18V to 36V Input Voltage Range
• Programmable Output Voltage
Range: 1.3V to 3.5V
• -40° to +100°C Operating Temp
• 1500 VDC Isolation
• 89% Efficiency
• Remote On/Off
• Differential Remote Sense
• 60A Output with PT4495
• Over-Current Protection
(Shutdown with Auto-Reset)
• Over-Temperature Protection
• Over-Voltage Protection
• Space-Saving Package
• Solderable Copper Case
• Safety Approvals:
UL 60950
CSA 22.2 950
VDE EN60950 Pending
Description
Ordering Information
Pin-Out Information
The PT4452 Excalibur™ DC/DC
converter module combines state-of-theart power conversion technology with
un-paralleled flexibility. Incorporating
high efficiency and ultra-fast transient
response, these modules provide up to
30A of output current over the programmable voltage range of 1.3V to 3.5V.
This represents a full 100W output at
3.3V.
The modules include a number of
inbuilt features to facilitate system
integration. These include output overcurrent shutdown (with auto reset),
over-temperature protection, and an
inhibit on/off control. A differential
remote sense is also provided to compensate for voltage drop between the
converter and load.
For additional output current, one
PT4452 may be operated with up to two
PT4495 compatible booster modules.
Each PT4495 adds an additional 30A of
output current capability.
PT4452o = 1.3 to 3.5 Volts
PT4495o = 30-A Booster
Pin
PT Series Suffix (PT1234 x )
Case/Pin
Configuration
Order
Suffix
Package
Code
N
A
C
Vertical
Horizontal
SMD
(EKD)
(EKA)
(EKC)
(Reference the applicable package code drawing for the dimensions and PC board layout)
†
Function
Pin
Function
1
+Vin
14
–Vout
2
–Vin
15
–Vout
3
Inhibit
16
–Vout
4
Vr †
17
–Vout
5
Va †
18
–Vout
6
No Connect
19
–Vout
7
(+)Remote Sense
20
(–)Remote Sense
8
+Vout
21
VID0
9
+Vout
22
VID1
10 +Vout
23
VID2
11 +Vout
24
VID3
12 +Vout
25
VID4
13 +Vout
26
DRV †
Pins 4, 5, & 26 are used for booster applications. For
stand-alone operation, leave open circuit.
Standard Application
+V IN
1
+
C1
2
+ V in
– V in
Inhibit
3
+V OUT
7
+ V sns
+ V out 8-13
PT4452
VID0 - VID4
• Co = Optional 330µF electrolytic capacitor
• C1 = Optional 33µF, 100V electrolytic capacitor
-V out 1 4 - 1 9
-V sns
21 22 23 24 25
L
O
A
D
+
Co
20
–V IN
–V OUT
PROGRAMMING PINS
For technical support and more information, see inside back cover or visit www.ti.com
• C2 = Optional 1µF, 100V ceramic capacitor
• Programming pins, VID0–VID4, are shown
configured for Vo =3.3V
• For normal operation, pin 3 (Inhibit) must be
connected to –Vin.
PT4452—24V
100-W 30-A Programmable
Isolated DC/DC Converter
Programming Information
VID3 VID2 VID1 VID0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
VID4=1 VID4=0
Vout
Vout
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
1.30V
1.35V
1.40V
1.45V
1.50V
1.55V
1.60V
1.65V
1.70V
1.75V
1.80V
1.85V
1.90V
1.95V
2.00V
2.05V
Logic 0 = Connect to (–)Remote Sense, pin 20
Logic 1 = Open circuit (no pull-up resistors)
Specifications
(Unless otherwise stated, Ta =25°C, Vin =24V, Vo =3.3V, Co =0µF, and Io =Iomax)
Characteristic
Symbol
Output Current
Input Voltage Range
Set Point Voltage Tolerance
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage Variation
Io
Vin
Vo tol
Regtemp
Regline
Regload
∆Votot
Efficiency
η
–40° ≤Tc ≤ +100°C, Io =0
Over Vin range
Over Io range
Includes set-point, line, load,
–40° ≤Tc ≤ +100°C
Io =15A
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
Transient Response
ttr
∆Vtr
Current Limit Threshold
Current Share Tolerance
Over-Voltage Protection
Switching Frequency
Under-Voltage Lockout
Inhibit (Pin 3)
Input High Voltage
Input Low Voltage
Input Low Current
Ilim thld
Ishr tol
OVP
ƒs
UVLO
0.1A/µs load step, 50% to 75% Iomax
Vo over/undershoot
1A/µs load step, 50% to 100% Iomax
Vo over/undershoot
Vin =18V, shutdown with auto-restart
with PT4495 booster
Shutdown and latch off
Over Vin range
Standby Input Current
Internal Input Capacitance
External Output Capacitance
Isolation Voltage
Capacitance
Resistance
Operating Temperature Range
Over-Temperature Shutdown
Storage Temperature
Reliability
VIH
VIL
IIL
Iin standby
Cin
Cout
Tc
OTP
Ts
MTBF
Mechanical Shock
—
Mechanical Vibration
—
Weight
Flammability
—
—
Conditions
Over Vin range
Over Io Range
Vo =3.3V
Vo =2.5V
Vo =1.5V
Vo >2.0V
Vo ≤2.0V
Referenced to –Vin (pin 2)
pins 3 & 2 connected
Between +Vo and –Vo
Input–output/input–case
Input to output
Input to output
Case temperature, over Vin range
Case temperature, auto reset
—
Per Bellcore TR-332
50% stress, Ta =40°C, ground benign
Per Mil-Std-883D, method 2002.3,
1mS, half-sine, mounted to a fixture
Mil-Std-883D, Method 2007.2
Horizontal
20-2000Hz, pcb mounted
—
Materials meet UL 94V-0
Min
PT4452
Typ
Max
Units
0
18
—
—
—
—
—
24
±1
±0.5
±0.1
±0.2
30
36
±1.5
—
±1
±1
A
VDC
%Vo
%Vo
%Vo
%Vo
—
±2
±3
%Vo
—
—
—
—
—
—
—
—
—
—
—
—
270
—
89
87
81
55
45
N/A
1
75
±5
35
±10
125
300
17
—
—
—
75
55
—
—
—
—
—
—
—
350
—
2.5
–0.5
—
—
—
0
1500
—
10
-40
—
-40
—
—
–0.2
4
3
—
—
1100
—
—
120
—
Open (1)
+0.8
—
10
—
10,000
—
—
—
+115 (2)
—
+125
mA
mA
µF
µF
V
pF
MΩ
°C
°C
°C
1.4
—
—
106 Hrs
—
500
—
G’s
—
20 (3)
—
G’s
—
90
—
grams
%
mVpp
µs
%Vo
µs
%Vo
A
%
%Vo
kHz
V
V
Notes: (1) The Inhibit (pin 3) has an internal pull-up, which if left open circuit allows the converter to operate when input power is applied. The open-circuit is
limited to 6.5V. Refer to the application notes for interface considerations.
(2) See Safe Operating Area curves or contact the factory for the appropriate derating.
(3) The case pins on through-hole pin configuration (suffix A) must be soldered. For more information see the applicable package outline drawing.
For technical support and more information, see inside back cover or visit www.ti.com
Typical Characteristics
PT4452—24V
100-W 30-A Programmable
Isolated DC/DC Converter
PT4452 Performance Characteristics (See Note A)
Safe Operating Area, Vin =24V
Efficiency vs Output Current
(See Note B)
Stand Alone, No Heatsink
100
90
90
Efficiency - %
80
3.3V
2.5V
1.5V
70
60
Ambient Temperature (°C)
80
VOUT
Airflow
70
500LFM
400LFM
300LFM
200LFM
100LFM
Nat conv
60
50
40
30
50
0
5
10
15
20
25
20
30
0
Iout (A)
5
10
15
20
25
Iout (A)
Ripple vs Output Current
100
80
Ripple - mV
VOUT
60
3.3V
2.5V
1.5V
40
20
0
0
5
10
15
20
25
30
Iout (A)
Power Dissipation vs Output Current
20
16
Pd - Watts
VIN
12
18.0V
24.0V
36.0V
8
4
0
0
5
10
15
20
25
30
Iout (A)
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter.
Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures
For technical support and more information, see inside back cover or visit www.ti.com
30
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