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参数资料
型号： PTN78020AAH
厂商： TEXAS INSTRUMENTS INC
元件分类： 电源模块
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封装： ROHS COMPLIANT
文件页数： 14/20页
文件大小： 1237K
代理商： PTN78020AAH
www.ti.com
ELECTRICAL CHARACTERISTICS
PTN78020A
SLTS244A – APRIL 2005 – REVISED MAY 2005
operating at 25°C free-air temperature, V
I = 20 V, VO = –5 V, IO = IO (max), CI = 100 F and 4x 4.7 F, CO = 100 F (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VO = -3 V
0.1
4 (1)
VO = -5 V
0.1
4 (1)
TA = 25°C, natural convec-
IO
Output current
A
tion airflow
VO = -12 V
0.1
2.1 (1)
VO = -15 V
0.1
1.67 (1)
VO = -3 V
9
29 (2)
VO = -5 V
9
27 (2)
VI
Input voltage range
Over IO range
V
VO = -12 V
9
20 (2)
VO = -15 V
9
17 (2)
Set-point voltage tolerance
TA = 25°C
±2%(3)
Temperature variation
-40°C to +85°C
-0.5%
Line regulation
Over VI range
-10
mV
VO
Load regulation
Over IO range
-10
mV
Includes set point, line, load
Total output voltage variation
-3% (3)
-40 < TA < 85°C
VO (adj)
Output voltage adjust range
9 V
≤ V
I ≤ (32 – |VO|) V
-15
- 3
V
VI = 12 V, RSET = 100 , VO = –15 V
87%
VI = 12 V, RSET = 2 k, VO = –12 V
86%
η
Efficiency
VI = 20 V, RSET = 28.7 k, VO = –5 V
82%
VI = 24 V, RSET = 221 k, VO = –3.3 V
77%
Output voltage ripple
20-MHz bandwidth
1% VO
V(PP)
IO (LIM)
Current limit threshold
V
O = –50 mV
8.5
A
1 A/s load step from 50% to 100%
IOmax
Transient response
Recovery time
200
s
VO over/undershoot
5
%VO
FS
Switching frequency
Over VI and IO ranges
440
550
660
kHz
UVLO
Undervoltage lockout
VI increasing
5.5
V
Ceramic
18.8 (4)
CI
External input capacitance
F
Nonceramic
100 (4)
Ceramic
200
F
CO
External output capacitance
Nonceramic
100 (5)
2,000
Equivalent series resistance (nonceramic)
10 (6)
m
Per Telcordia SR-332, 50% stress,
MTBF
Calculated reliability
5.6
106 Hrs
TA = 40°C, ground benign
(1)
The maximum output current is 4 A, or a maximum output power of 25 W, whichever is less.
(2)
The maximum input voltage is limited and defined to be (32 – |VO|) volts.
(3)
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1% with 100 ppm/°C or better temperature stability.
(4)
A minimum 100-F electrolytic and four 4.7-F ceramic capacitors are required across the input (VI and GND) for proper operation.
Locate the ceramic capacitors close to the module.
(5)
100 F of output capacitance is required for proper operation. See the application information for further guidance.
(6)
This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 17 m
as the minimum when using max-ESR values to
calculate.
3
相关PDF资料
PDF描述
PTN78020AAS 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
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