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www.ti.com
PTB48510
PTB48511
SLTS219F – FEBRUARY 2004 – REVISED MARCH 2007
DUAL COMPLEMENTARY-OUTPUT DC/DC CONVERTER FOR DSL
1
FEATURES
Dual Complementary Outputs
(±5 V, ±12 V, or ±15 V)
Input Voltage Range: 36 V to 75 V
On/Off Enable for Sequencing
1500 V
DC
Isolation
Overcurrent Protection
Overvoltage Protection (PTB48511 only)
Over Temperature Shutdown
Undervoltage Lockout
Temperature Range: –40°C to 85°C
Industry Standard Outline
Fixed Frequency Operation
Synchronizes with PTB48500
Powers Line Drivers for AC-7 and Other xDSL
Chipsets
Safety Approvals:
– EN 60950
– UL/cUL 60950
STAND-ALONE APPLICATION
PTB4851x
+V
I
1
+V
I
V
O1
5
I
O1
L
O
A
D
•
•
•
•
•
•
•
•
•
•
•
•
•
•
DESCRIPTION
The PTB4851x series of isolated DC/DC converter
modules produce a complementary pair of regulated
supply voltages for powering line-driver devices in
xDSL telecom applications. The modules operate
from a standard telecom (–48 V) central office (CO)
supply and can provide up to a 72 W of power in a
balanced load configuration.
The A-suffix module (±5 V) is designed to power the
line driver devices for the AC-7 ADSL chipset. Other
voltage options powers other analog applications
requiring a complementary supply with relatively
balanced loads.o
Both the PTB48510 and PTB48511 include an
“on/off” enable control, output current limit,
over-temperature protection, and input under-voltage
lockout (UVLO). The PTB48511 adds output
overvoltage protection (OVP).
The control inputs,
Enable
and
Sync In,
are
compatible with the
EN Out
and
Sync Out
signals of
the PTB48500 DC/DC converter. This allows the
power-up and switching frequency of the PTB4851x
modules to be directly controlled from a PTB48500.
Together the PTB48500 and PTB4851xA converters
meet all the system power and sequencing
requirements of the AC- ADSL chipset.
The PTB4851x uses double-sided surface mount
technology contruction. The package size is based on
the industry standard outline and does not require a
heatsink. Both through-hole and surface mount pin
configurations are available.
COM
2
Sync In
COM
6
I
O2
3
-V
I
4
-V
I
*V
O2
8
*V
O1
@
| V
O2
|
*V
O2
is the negative voltage.
UDG-07040
Enable
V
O
Adj
7
L
O
A
D
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004–2007, Texas Instruments Incorporated
PTB48510
PTB48511
SLTS219F – FEBRUARY 2004 – REVISED MARCH 2007
www.ti.com
ORDERING INFORMATION
BASE DEVICE NUMBER. (PTB4851xxx)
ORDER
PREFIX
PTB48510xxx
PTB48511xxx
(1)
(2)
(3)
(4)
Basic model
Adds output overvoltage protection
(2)
DESCRIPTION
OUTPUT VOLTAGE
(PTB4851xx)
CODE
A
B
C
VOLTAGE
(V)
±5
±12
±15
(4)
PACKAGE OPTIONS (PT4851xx)
CODE
AH
AS
DESCRIPTION
Horizontal T/H
SMD, Standard
(3)
PACKAGE
REFERENCE
(1)
ERK
ERL
Reference the applicable package reference drawing for the dimensions and PC board layout
Output overvoltage protection
Standard
option specifies 63/37, Sn/Pb pin solder material
±15-V output is not available with the PTB48511
Environmental and General Specifications
(Unless otherwise stated, all voltages are with respect to V
I2
)
VALUE
V
I
Input Voltage Range
Isolation Voltage
Capacitance
Resistance
T
A
OTP
T
reflow
T
s
Operating Temperature Range
Over-Temperature Protection
Solder Reflow Temperature
Storage Temperature
Mechanical Shock
Mechanical Vibration Mil-STD-883D
Weight
Flammability
(1)
(2)
Meets UL 94V-O
Per Mil-STD-883D, Method 2002.3 T/H
1 ms, 1/2 Sine, mounted
SMD
Mil-STD-883D, Method 2007.2
20-2000 Hz
T/H
SMD
Over output load range
Input-output/input/case
Input to output
Input to output
Over V
I
Range
Shutdown threshold
Hysterisis
Surface temperature of module body or pins
36 to 75
1500
1500
10
–40 to 85
115
(1)
10
235
(2)
UNIT
V
DC
V
pF
mΩ
°C
–55 to 125
500
250
10
5
28
G
G
grams
This parameter is assured by design.
During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated
maximum.
2
Submit Documentation Feedback
Copyright © 2004–2007, Texas Instruments Incorporated
Product Folder Link(s):
PTB48510 PTB48511
www.ti.com
PTB48510
PTB48511
SLTS219F – FEBRUARY 2004 – REVISED MARCH 2007
ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, T
A
= 25°C, V
I
= 48 V, C
I
= 0
µF,
C
O
= 0
µF,
I
O1
= I
O2
= 3.25 A maximum)
PARAMETER
P
O
I
O1
, I
O2
I
O1
- I
O2
V
O1
, V
O2
ΔReg
temp
ΔReg
line
ΔReg
load
η
V
r
t
tr
ΔV
tr
I
O
trip
V
O1(trip)
,
V
O2(trip)
Output Power
Output Current
Output Load Imbalance
Output Voltage
Temperature Variation
Line Regulation
Load Regulation
Efficiency
V
O
Ripple (pk-pk)
Transient Response
Overcurrent Threshold
Overvoltage Threshold
Short Circuit Current
V
O1(adj)
,
V
O2(adj)
f
S
V
I
on
V
I
off
V
IH
V
IL
I
IL
I
I
standby
t
ON
C
I
C
O
MTBF
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Output Voltage Adjust
Range
Switching Frequency
Undervoltage lockout
On/Off Enable (pin 3)
High-level input voltage
Low-level input voltage
Low-level input current
Standby Input Current
Start-up Time
Internal Input Capacitance
External Output
Capacitance
Reliability
Capacitance from either output to COM (pin 6)
Per Telcordia SR-332 50% stress,
T
A
= 40°C, ground benign
PTB48510A
PTB48511A
0
2.7
2.5
Pin 3 connected
I
O1
≤
0.1 A or I
O2
≤
0.1 A, V
O1
or V
O2
rising 0 to 0.95 (typ)
6
2
10
3
5000
(8
)
22
Referenced to V
I
(pin 4)
3.6
–0.2
75
(7)
0.8
–1
V
mA
mA
ms
µF
µF
10
6
hrs
20 MHz bandwidth, C
O
= 10-µF tantalum capacitor
0.11 A/µs load step, 50% to 75% I
O1
or I
O2
maximum
V
O1
or V
O2
overshoot/undershoot
V
I
= 36 V, reset followed by auto-recovery
Outputs latched off
(5)
TEST CONDITIONS
Total output power from V
O1
or V
O2
Over V
I
range, I
O1
≤
0.1 A or I
O2
≤
0.1 A
I
O1
≤
0.1 A or I
O2
≤
0.1 A
Includes set point, line, load, I
O1
≤
0.1 A or I
O2
≤
0.1 A
–40°C
≤
T
A
≤
85°C
–40°C
≤
T
A
≤
85°C, I
O1
≤
0.1 A or I
O2
≤
0.1
A
Over V
I
range, balanced load
Over I
O1
, I
O2
range, balanced load
V
O1
V
O2
V
O1
or V
O2
V
O1
or V
O2
PTB4851xA
MIN
0
0
0
4.75
(2)
TYP
MAX
65
6.5
1
(1)
(2)
(3)
UNIT
W
A
A
V
%V
O
5 5.25
(2)
±1
±1
±0.1
±0.2
86%
20
30
±1.0
30
(4)
±0.4
±0.4
%V
O
%V
O
mV
pp
µs
%V
O
6.8
PTB48510
PTB48511
I
O1(pk)
I
O2(pk)
Duty
3.5
440
NA
5.9
7.5
10
NA
7
A
V
A
Continuous overcurrent trip, I
O1
= I
O2
V
O1
or V
O2
adjust simultaneously
Over V
I
and I
O
ranges
V
I
increasing
V
I
decreasing
12.5
10%
5.5
470
(6)
33
32
500
V
kHz
V
See Safe Operating Area curves or contact the factory for the appropriate derating.
Under balanced load conditions, load current flowing out of V
O1
is balanced to within ±0.1 A of that flowing into V
O2
.
A load imbalance is the difference in current flowing from V
O1
to V
O2
. The module can operate with a higher imbalance but with reduced
specifications.
Output voltage ripple is measured with a 10-µF tantalum capacitor connected from V
O1
(pin 5) or V
O2
(pin 8), to COM (pin 6).
If the overvoltage threshold is exceeded by either regulated output the module will shut down, turning both outputs off. This is a latched
condition, which can only by reset by removing and then re-applying the module's input power.
This is the free-running frequency. The module can be made to synchronize with the PTB48500 when both modules are used together
in a system.
The On/Off Enable (pin 3) has an internal pull-up and may be controlled with an open-collector (or open-drain) transistor. The input is
diode protected and may be connected to V
I
. The open-circuit voltage is 5 V maximum. If it is left open circuit the converter operates
when input power is applied.
Electrolytic capacitors with very low equivalent series resistance (ESR) may induce instability when used on the output. Consult the
factory before using capacitors with organic, or polymer-aluminum type electrolytes.
Copyright © 2004–2007, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Link(s):
PTB48510 PTB48511
PTB48510
PTB48511
SLTS219F – FEBRUARY 2004 – REVISED MARCH 2007
www.ti.com
ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, T
A
= 25°C, V
I
= 48 V, C
I
= 0
µF,
C
O
= 0
µF,
I
O1
= I
O2
= 3.25 A maximum)
PARAMETER
P
O
I
O1
or I
O2
I
O1
- I
O2
V
O1
or V
O2
ΔReg
temp
ΔReg
line
ΔReg
load
η
V
r
t
tr
ΔV
tr
I
O
trip
V
O1(trip)
,
V
O2(trip)
Output Power
Output Current
Output Load Imbalance
Output Voltage
Temperature Variation
Line Regulation
Load Regulation
Efficiency
V
O
Ripple (pk-pk)
Transient Response
Overcurrent Threshold
Overvoltage Threshold
Short Circuit Current
V
O1(adj)
,
V
O2(adj)
f
S
V
I
on
V
I
off
V
IH
V
IL
I
IL
I
I
standby
t
ON
C
I
C
O
MTBF
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Output Voltage Adjust
Range
Switching Frequency
Under-Voltage Lockout
On/Off Enable (pin 3)
High-level input voltage
Low-level input voltage
Low-level input current
Standby Input Current
Start-up Time
Internal Input Capacitance
External Output
Capacitance
Reliability
Capacitance from either output to COM (pin 6)
Per Telcordia SR-332 50% stress,
T
A
= 40°C, ground benign
PTB48510B
PTB48511B
0
2.8
2.5
Pin 3 open circuit
I
O1
≤
1 A or I
O2
≤
1 A, V
O1
or V
O2
rising 0 to 0.95 (typ)
6
2
12
3
3000
(8
)
18
20 MHz bandwidth, C
O
= 10
µF
tantalum capacitor
0.1 A/µs load step, 50% to 75% I
O1
or I
O2
maximum
V
O1
or V
O2
overshoot/undershoot
V
I
= 36 V, reset followed by auto-recovery
Outputs latched off
(5)
TEST CONDITIONS
Total output power from V
O1
or V
O1
Over V
I
range, I
O1
≤
0.1 A or I
O2
≤
0.1 A
≤
0.1 A
I
O1
≥
0.1 A, I
O2
≥
0.1 A
Includes set point, line, load, I
O1
≤
0.1 A or I
O2
≤
0.1 A
≤
0.1 A
–40°C
≤
T
A
≤
85°C
–40°C
≤
T
A
≤
85°C, I
O1
≤
0.1 A or I
O2
≤
0.1
A
Over V
I
range, balanced load
Over I
O1
or I
O2
range, balanced load
V
O1
or V
O2
V
O1
or V
O2
V
O1
or V
O2
PTB4851xB
MIN
0
0
0
11.6
(2)
TYP
MAX
72
(1)
3
1
(2)
(3)
UNIT
W
A
A
V
%V
O
12 12.4
(2)
±1
±0.05
±0.1
89%
20
30
±1
80
(4)
±0.5
±1
%V
O
%V
O
mV
pp
µs
%V
O
3.3
PTB48510A
PTB48511A
I
O1(pk)
I
O2(pk)
Duty
6.5
440
NA
14
3.8
15.8
6
10%
5
NA
17
A
V
A
Continuous overcurrent trip, I
O1
= I
O2
V
O1
and V
O2
adjust simultaneously
Over V
I
and I
O
ranges
V
I
increasing
V
I
decreasing
Referenced to V
I
(pin 4)
13.4
480
(6)
33
32
500
V
kHz
V
3.6
–0.2
75
(7)
0.8
–1
V
mA
mA
ms
µF
µF
10
6
Hrs
See Safe Operating Area curves or contact the factory for the appropriate derating.
Under balanced load conditions, load current flowing out of V
O1
is balanced to within ±0.1 A of that flowing into V
O2
.
A load imbalance is the difference in current flowing from V
O1
to V
O2
. The module can operate with a higher imbalance but with reduced
specifications.
Output voltage ripple is measured with a 10
µF
tantalum capacitor connected from V
O1
(pin 5) or V
O2
(pin 8), to COM (pin 6).
If the overvoltage threshold is exceeded by either regulated output the module will shut down, turning both outputs off. This is a latched
condition, which can only by reset by removing and then re-applying the module's input power.
This is the free-running frequency. The module can be made to synchronize with the PTB48500 when both modules are used together
in a system.
The On/Off Enable (pin 3) has an internal pull-up and may be controlled with an open-collector (or open-drain) transistor. The input is
diode protected and may be connected to V
I
. The open-circuit voltage is 5 V maximum. If it is left open circuit the converter operates
when input power is applied.
Electrolytic capacitors with very low equivalent series resistance (ESR) may induce instability when used on the output. Consult the
factory before using capacitors with organic, or polymer-aluminum type electrolytes.
4
Submit Documentation Feedback
Copyright © 2004–2007, Texas Instruments Incorporated
Product Folder Link(s):
PTB48510 PTB48511
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