PTB48580AAH_14 Datasheet, PDF (2/14 Pages) Texas Instruments – Dual Complementary Outputs

PTB48580 Series
Dual Complementary-Output
DC/DC Converter for DSL
Not Recommended for New Designs
SLTS240 DECEMBER 2004
Ordering Information
Base Pt. No. (PTB48580xxx)
Order Prefix
Description
PTB48580xxx Basic Model
Output Voltage (PTB48580❒xx)
Code
Voltage
A
±5 V
B
±12 V
Package Options (PT48580x❒❒)
Code Description
Pkg Ref. ⁽¹⁾
AH Horiz. T/H
AS
SMD, Standard ⁽²⁾
(ERV)
(ERS)
Notes: (1) Reference the applicable package reference drawing for the dimensions and PC board layout
(2) “Standard” option specifies 63/37, Sn/Pb pin solder material.
Pin Descriptions
+V_I: The positive input supply for the module with respect
to –V_I. When powering the module from a –48 V telecom
central office supply, this input is connected to the primary
system ground.
–V_I: The negative input supply for the module, and the
0 VDC reference for the ‘Enable*’, and ‘Sync In’ signals.
When the module is powered from a +48-V supply, this
input is connected to the 48-V Return.
+V_O: The positive output supply voltage, which is refer-
enced to the ‘COM’ node. The voltage at ‘+V_O’ has the
same magnitude, but is the complement to that at ‘-V_O’.
–V_O: The negative output supply voltage, which is refer-
enced to the ‘COM’ node. The voltage at ‘-V_O’ has the
same magnitude, but is the complement to that at ‘+V_O’.
COM: The secondary return reference for the module’s
regulated output voltages. This node is dc isolated from
the input supply pins.
±V_O Adjust: Using a single resistor, this pin allows the
magnitude of both ‘+V_O’ and ‘–V_O’ to be adjusted to-
gether, either higher or lower than their preset value. If
not used, this pin should be left open circuit.
Enable*: This is an open-collector (open-drain) negative
logic input that enables the module output. This pin is
referenced to -V_I. A logic ‘0’ at this pin enables the
module’s outputs, and a high impedance disables the
outputs. If this feature is not used the pin should be con-
nected to –V_I. Note: Connecting this input directly to the
“EN Out” pin of the PTB4850x enables the output voltages
from both converters (PTB4850x and PTB48580) to power
up in sequence.
Sync In: This pin is used when the PTB48580 and PTB4850x
DC/DC converter modules are used together. Connect-
ing this pin to the ‘Sync Out’ of the PTB4850x module
allows the PTB48580 to be synchronized to the same
switch conversion frequency as the PTB4850x.
Environmental and General Specifications (Unless otherwise stated, all voltages are with respect to –VI)
Characteristics
Symbols
Conditions
Min
Typ
Input Voltage Range
Isolation Voltage
Capacitance
Resistance
Operating Temperature Range
Over-Temperature Protection
Solder Reflow Temperature
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
Flammability
V_I
T_A
OTP
T_REFLOW
T_S
—
—
Over output load range
36
Input–output/input–case
1500
Input to output
—
Input to output
10
Over V_I Range
–40
Shutdown threshold
—
Hysterisis
—
Surface temperature of module body or pins
—
–40
Per Mil-STD-883D, Method 2002.3
1 msec, ½ Sine, mounted
—
Mil-STD-883D, Method 2007.2
20-2000 Hz
T/H —
SMD —
—
Meets UL 94V-O
48
—
1500
—
—
115 ⁽ⁱ⁾
10
—
500
20
5
13.5
Max
75
—
—
—
+85
—
—
235 ⁽ⁱⁱ⁾
125
—
—
—
—
Units
VDC
V
pF
MΩ
°C
°C
°C
°C
G’s
G’s
grams
Notes: (i) This parameter is guaranteed be design
(ii) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.
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