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参数资料
| 型号： | PTMA402050P1AZT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 10 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, DIP-5 |
| 文件页数： | 31/35页 |
| 文件大小： | 1867K |
| 代理商： | PTMA402050P1AZT |
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PTMA401120 ELECTRICAL CHARACTERISTICS
SLTS259B – FEBRUARY 2006 – REVISED MAY 2007
T
A = 25°C, VI = 48 V, VO = 12 V, CI = 0 F, CO = 0 F, and IO = IOmax (Unless otherwise stated)
PTMA401120
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
PO
Output power
Over VI range
12
W
IO
Output current
Over VI range
0.1 (1)
1 (2)
A
ILIM
Current Limit Threshold
Shutdown, followed by autorecovery
1.5
A
VI
Input voltage range
Over IO range
36
48
75
V
Set-point voltage tolerance
±2 (3)
%VO
Temperature variation
-40
°C ≤ T
A ≤ 85°C
±1
%VO
Line regulation
Over VI range
10
mV
VO
Load regulation
Over IO range
3
mV
Total output voltage variation
Includes set-point, line, load, –40
°C ≤ T
A ≤ 85°C
3
5 (3)
%VO
Trim adjust range
Over VI range
10.8
13.2
V
η
Efficiency
PO = POmax
87%
VO Ripple (peak-to-peak)
20-MHz bandwidth
85
mVpp
0.1 A/
s load step,
Recovery time
400
s
Transient Response
50% to 100%
VO over/undershoot
±250
mV
IOmax
Referenced to VI–
Input high voltage (VIH)
4.5
Open (4)
V
Output enable input (pin 3)
Input low voltage (VIL)
–0.2
0.8
Input low current (IIL)
1
mA
Standby input current
Pin 3 open
8
mA
UVLO
Undervoltage lockout
32
34
V
OVP
Output Overvoltage Protection
13.5
17.5
V
S
Switching frequency
Over VI range
250
300
350
kHz
Free-running
180
215 (5)
250
Sync switching frequency
kHz
Synchronization range
250 (5)
350 (5)
SYNC
high-level input voltage
3.5
6
V
low-level input voltage
–0.3
0.5
V
clock duty cycle
25
75
%
CI
External input capacitance
0
47
F
CO
External output capacitance
0
47(6)
220
F
VISO
Isolation voltage
1,500
Vdc
CISO
Isolation capacitance
Primary-Secondary
1,100
pF
RISO
Isolation resistance
10
M
(1)
The converter requires a minimum load current for proper operation. The converter is not damaged when operated under a no-load
condition.
(2)
See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures.
(3)
The set-point voltage tolerance is affected by the tolerance and stability of RTRIM. The stated limit is unconditionally met if RTRIM has a
tolerance of 1%, with 100 ppm/
°C temperature stability.
(4)
The Enable input (pin 3) has an internal pullup resistor. Do not place an external pullup resistor on this input pin. If the enable feature is
not used, for a positive enable device this input should be left open circuit and a negative enable device should be permanently
connected to VI– (pin 2). A discrete MOSFET or bipolar transistor is recommended for the enable control. The open-circuit voltage is
typically less than 5 V. See the Application Information for a more detailed description.
(5)
A device with the synchronization option has a reduced switching frequency of 215 kHz typical. The synchronization frequency can only
be adjusted to a higher frequency, up to 350 kHz maximum.
(6)
An output capacitor is not required for proper operation. However, additional capacitance at the load will improve the transient response.
5
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