PTEA420025 Datasheet, PDF (4/16 Pages) Texas Instruments – 20-A, 48-V INPUT, ISOLATED, 1/8th BRICK DC-DC CONVERTER

PTEA420025, PTEA420033
SLTS288C – JUNE 2007 – REVISED OCTOBER 2010
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ELECTRICAL CHARACTERISTICS PTEA420033
(Unless otherwise stated, T_A =25°C, V_I = 48 V, V_O = 3.3 V, C_O = 0 mF, and I_O = I_O(max))
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
ΔV_otot
Temperature Variation
Line Regulation
Load Regulation
Total Output Voltage
Variation
–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
ΔV_ADJ
h
V_R
t_tr
ΔV_tr
I_TRIP
OVP
Output Adjust Range
Efficiency
V_O Ripple (pk-pk)
Transient Response
Overcurrent Threshold
Output Overvoltage
Protection
P_O ≤ 100 W
I_O = 50% I_O(max)
20 MHz bandwidth
0.1 A/ms slew rate, 50% to 75% I_O(max)
V_O over/undershoot
Shutdown, followed by auto-recovery
Output shutdown and latch off
OTP
Over Temperature
Protection
Temperature Measurement at thermal sensor. Hysteresis = 10°C
nominal.
f_s
Switching Frequency
UVLO Undervoltage Lockout
On/Off Input: Negative Enable
Over V_I range
V_OFF
V_HYS
V_I decreasing, I_O = 6 A
Hysteresis
V_IH
Input High Voltage
V_IL
Input Low Voltage
I_IL
Input Low Current
On/Off Input: Positive Enable
Referenced to –V_I
V_IH
Input High Voltage
V_IL
Input Low Voltage
Referenced to –V_I
I_IL
Input Low Current
I_Isb
Standby Input Current
Output disabled (pin 2 status set to Off)
C_I
External Input Capacitance Between +V_I and –V_I
C_O
External Output
Capacitance
Between +V_O and –V_O
Isolation Voltage
Input-to-output and input-to-case
Isolation Capacitance
Input-to-output
Isolation Resistance
Input-to-output
PTEA420033
MIN TYP MAX UNIT
0
20 A
36
48
±1 ⁽¹⁾
75 V
%V_O
±1.15
±5
±5
±1.5
%V_O
mV
mV
±3 %V_O
–20
91%
50
150
90
28
120
10 %V_O
mV_pp
ms
mV
A
%V_O
105
°C
290
kHz
29.4
V
3.3
2.4
–0.2
Open ⁽²⁾
V
0.8
–0.2
mA
2.4
–0.2
Open ⁽²⁾
V
0.8
–0.2
mA
42
mA
100
mF
0
20000 mF
1500
Vdc
1200
pF
10
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 (drain) interface. An open circuit
correlates to a logic high. Consult the application notes for interface considerations.
4
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