LES20B48-3V3SJ 반도체 회로 부품 판매점
DC-DC / Industry Standard Isolated Eighth Brick
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 Emerson |
Embedded Power for
Business-Critical Continuity
Eighth-Brick
B Series
Total Power: Up to 80 Watts
Input Voltage: 36-75 Vdc
No. of Outputs: Single
Rev. 11.25.08_138
Eighth-Brick B Series
1 of 4
Special Features
• High efficiency topology
• Industry standard eighth-brick foot
print (identical to quarter-brick
pinout)
• Low profile through-hole and
surface mount version
• 38% space savings over quarter-
brick converters
• Wide ambient temperature
range, -40 ºC to +85 ºC
• 90% to 110% output trim
• 100 V, 100 ms input voltage
transient rated
• Meets basic insulation
requirements of EN60950-1
• Industry standard feature sets:
UVLO, OVP, OCP, OTP, O/P trim,
remote sense
• Regulation to zero load
• Fixed frequency switching
• Fast transient switching
• EU directive 2002/95/EC
compliant for RoHS
Electrical Specifications*
Output
Voltage adjustability:
Minimum load:
Overshoot:
Undershoot:
Transient Response:
(See Note 1)
At turn-on and turn-off
At turn-on and turn-off
Input
Input voltage range:
Input current:
Active high remote ON/OFF
Logic compatibility:
ON
OFF
Undervoltage Lockout:
Start-up time:
(See Note 2)
48 V nominal
No load
Remote OFF
Power up
Power up
Power up
Remote ON/OFF
*All specifications are typical at nominal input,
full load at 25 °C ambient unless otherwise stated.
Safety
• UL/cUL60950-1 CAN/CSA 22.2
• TUV EN/IEC60950-1
90% to 110%
0A
None
None
5% Vout typ. deviation
40 µs recovery
36-75 Vdc
100 mA
10 mA
TTL compatible ref to -input
>2.4 Vdc
<0.8 Vdc
35.5 V (typ.)
35.5 V (typ.)
25 ms (typ.)
5 ms (typ.)
Embedded Power for
Business-Critical Continuity
Electrical Specifications
General
Basic insulation:
Switching frequency:
Approvals and
standards:
Material flammability:
Weight:
MTBF:
Input/output
Fixed
Telcordia SR-332 Issue 1,
50% stress, 40 °C ambient
2250 V dc
500 kHz
EN60950-1 VDE
UL/cUL60950-1
UL94V-0
20 g (0.70 oz)
4.2 M hours
EMC Characteristics
Immunity:
ESD air enclosure:
Radiated field enclosure:
Conducted:
Input transients:
EN1000-4-2 8 kV/6 kV
EN1000-4-3 10 V/m
EN1000-4-6 10 V
100 V, 100 ms
(O/P within spec.)
(O/P within spec.)
(O/P within spec.)
Environmental Characteristics
Thermal performance:
Operating ambient
temperature
Non-operating
-40 °C to +85 °C
-40 °C to +125 °C
Protection
Short-circuit:
Overvoltage:
Thermal:
115% with automatic recovery
125% Vo (typ) with automatic recovery
125 °C hot spot temperature with
automatic recovery
Notes
Rev. 11.25.08_138
Eighth-Brick B Series
2 of 4
1 di/dt = 1 A/µs, Vin = 48 Vdc, Tc = 25 °C, load change =
50% to 75% lo max. and 75% to 50% lo max. Deviation
varies by model. For further details see Technical
Reference Notes (TRN).
2 Start-up into resistive load.
3 This product is only for inclusion by professional
installers within other equipment and must not be
operated as a stand alone product.
4 Recommended input fusing is up to 10 A HRC 200 V
rated fuse.
5 Warranty: 2 years.
6 through-hole version intended for wave soldering
process.
7 The ‘J’ suffix indicates that these parts are Pb-free
(RoHS 6/6) compliant.
Ordering Information
Output
Voltage
12.0 V
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
1.0 V
Output
Current
(Max)
6.7
Efficiency
(Typ)
92%
13 92%
20 91%
22 90%
25 89%
25 88%
25 86%
25 85%
Set Point
Accuracy
(Typ)
±1%
Regulation
Line
±0.1%
±1% ±0.1%
±1% ±0.1%
±1% ±0.1%
±1% ±0.1%
±1% ±0.1%
±1% ±0.1%
±1% ±0.1%
Load
Ripple & Noise Model Number(7)
(Typ)
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
70 mVp-p
30 mVp-p
30 mVp-p
30 mVp-p
30 mVp-p
25 mVp-p
25 mVp-p
20 mVp-p
LES06B48-12V0REJ
LES13B48-5V0REJ
LES20B48-3V3REJ
LES22B48-2V5REJ
LES25B48-1V8REJ
LES25B48-1V5REJ
LES25B48-1V2REJ
LES25B48-1V0REJ
Part Number System with Options
Product
Family
Rated Output
Current
Vintage
Nominal Rated
Input Voltage
Type of
Output
Remote
ON/OFF LOGIC
Body Height, Package Type
and Pin Length
RoHS
Compliance
(7)
LES 22
B
48 -
2V5
R
E
J
L = Low Profile
22 = 22 Amps,
E = 1/8 Brick 20 = 20 Amps, etc.
S = Single Output
A = 1st generation
B = 2nd generation
48 = 48 Volts 2V5 = 2.5 Volts Blank = Positive
(36 - 75 VDC range) 3V3 = 3.3 Volts R = Negative
A = 0.33 in (8.1 mm),Through Hole
0.19 in (4.8 mm), Pins
E = 0.37 in (9.1 mm), Through Hole
0.19 in (4.8 mm), Pins
S = 0.33 in (8.1 mm), Surface Mount
J = Pb free (RoHS
6/6 compliant)
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( emerson )
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