PTEA404120 Datasheet, PDF (3/14 Pages) Texas Instruments – 50-W, 48-V INPUT, 12-V OUTPUT, ISOLATED DC/DC CONVERTER

PTEA404120
www.ti.com
SLTS274A – DECEMBER 2006 – REVISED JANUARY 2007
ELECTRICAL CHARACTERISTICS PTEA404120
(Unless otherwise stated, T_A =25°C, V_I = 48 V, V_O = 12 V, C_O = 0 µF, and I_O = I_Omax)
PARAMETER
TEST CONDITIONS
I_O
V_I
V_O tol
Output Current
Input Voltage Range
Set Point Voltage Tolerance
Over V_I range
Over I_O Range
Reg_temp
Reg_line
Reg_load
∆V_otot
∆V_ADJ
η
V_R
t_tr
∆V_tr
I_TRIP
OVP
OTP
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage Variation
Output Adjust Range
Efficiency
V_O Ripple (pk-pk)
Transient Response
Overcurrent Threshold
Output Overvoltage Protection
Over Temperature Protection
f_s
UVLO
Switching Frequency
Undervoltage Lockout
On/Off Input: Negative Enable
V_IH
Input High Voltage
V_IL
Input Low Voltage
I_IL
Input Low Current
On/Off Input: Positive Enable
V_IH
Input High Voltage
V_IL
Input Low Voltage
I_IL
Input Low Current
I_ISB
Standby Input Current
C_I
External Input Capacitance
C_O
External Output Capacitance
Isolation Voltage
Isolation Capacitance
Isolation Resistance
–40°C >T_A > 85°C
Over V_I range
Over I_O range
Includes set-point, line, load, –40°C >T_A > 85°C
P_O≤ 50 W and I_O≤ 4.2 A
I_O = I_Omax
20 MHz bandwidth
0.1 A/µs slew rate, 50% to 75% I_Omax
V_O over/undershoot
Shutdown, followed by auto-recovery
Output shutdown and latch off
Temperature Measurement at thermal sensor. Hysteresis
= 10°C nominal.
Over V_I range
V_OFF
V_HYS
V_I decreasing, I_O = 1 A
Hysteresis
Referenced to –V_I
Referenced to –V_I
Output disabled (pin 2 status set to Off)
Between +V_I and –V_I
Between +V_O and –V_O
Equivalent Series Resistance
Input-to-output and input-to-case
Input-to-output
Input-to-output
MIN
0
35
11.88
–40
2.4
–0.2
4.5
–0.2
0
0
10
10
TYP
48
±1 ⁽¹⁾
12
±1.15
±5
±5
±1.5
91%
50
500
200
7
120
115
MAX
4.2
75
12.12
±3
10
UNIT
A
V
%V_O
V
%V_O
mV
mV
%V_O
%V_O
mV_pp
µs
mV
A
%V_O
°C
250
kHz
32.5
V
1.5
Open ⁽²⁾
V
0.8
–0.3
mA
Open ⁽²⁾
V
0.8
–0.3
mA
10 mA
100
µF
1000 µF
mΩ
2000
Vdc
1200
pF
MΩ
(1) If Sense(–) is not used, pin 5 must be connected to pin 4 for optimum output voltage accuracy.
(2) The Remote On/Off input has an internal pull-up and may be controlled with an open collector (or open drain) interface. An open circuit
correlates to a logic high. Consult the application notes for interface considerations.
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