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* * Frequency Range from 10KHz to 200KHz * Fully Encapsulated Construction
PM-CSXX CURRENT SENSE TRANSFORMERS Designed for Switch Mode Power Supply Applications * Tapped and Untapped Versions
RoHS
* 2500Vrms Minimum Isolation Voltage * Primary Lead Included
ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERATURE RANGE -40OC TO +80OC CONTROL VALUES PART NUMBER PM-CS01 PM-CS02 PM-CS03 PM-CS04 PM-CS05 PM-CS06 PM-CS07 PM-CS08 REFERENCE VALUES CALC. VALUES
FLUX FACTOR KB LOSS FACTOR KL SCHEMATIC
DCR TURNS INDUCTANCE LS RS IPK RT KV DROOP NS + 1% (mH Min.) (Ohms Max.) (Amps) (Ohms) (Volt/Amp) (%)
50 100 200 300 50ct 100ct 200ct 300ct
5.0 20.0 80.0 180.0 5.0 20.0 80.0 180.0
0.70 1.40 4.50 11.00 0.50 1.00 2.00 3.00
35 50 50 75 35 50 50 75
15 50 200 300 15 50 200 300
0.30 0.50 1.00 1.00 0.30 0.50 1.00 1.00
2.4 2.0 2.0 1.4 2.4 2.0 2.0 1.4
273.97x103 68.49x103 17.12x103 7.61x103 273.97x103 68.49x103 17.12x103 7.61x103
3.31x10- 9 3.33x10- 9 3.35x10- 9 3.37x10- 9 3.31x10- 9 3.33x10- 9 3.35x10- 9 3.37x10- 9
A A A A B B B B
REFER TO CALCULATION EXAMPLE FOR PM-CSXX SERIES ON PAGE 2 OF THIS DATA SHEET. 1) REFERENCE VALUES ARE FOR UNIPOLAR OPERATION @ 50KHz, 40% DUTY CYCLE (Dmax = .40). 2) THE MAXIMUM USABLE PEAK SENSE CURRENT (Ipk) IS DEPENDENT ON CORE SATURATION FACTORS AND SHOULD BE EVALUATED FOR THE ACTUAL OPERATING CONDITIONS. SEE APPLICATION DATA AND EXAMPLE ON PAGE 51. 3) THE MAXIMUM RECOMMENDED OPERATING FLUX DENSITY (BOP) @ AN OPERATING TEMPERATURE OF 105O C IS 2000 GAUSS. 4) THE TERM. RESISTOR (Rt ) CAN BE VARIED TO ADJUST THE OPERATING FLUX DENSITY (BOP), DROOP, AND SCALE FACTOR (KV). 5) THE SCALE FACTOR (KV) IS PROPORTIONAL TO THE TERMINATING RESISTOR (RT ) AND IS EQUAL TO 1VOLT/AMP WHEN R = NS T 6) SECONDARY INDUCTANCE IS MEASURED AT 20KHz, 1.0VRMS.
SCHEMATIC SCHEMATIC "A"
WHITE DOT DENOTES PIN #1
MECHANICAL PHYSICAL Dimensions in inches (mm)
1
1 1 TURN PRIMARY 2 3 4 5
3
P M
2
PM-CSXX YYWW
4 5
.900 (22.86) MAX.
.700 (17.78) MAX.
UNUSED PINS MAY BE OMITTED
SCHEMATIC "B"
WHITE DOT DENOTES PIN #1
.700 (17.78) MAX.
1 1 TURN PRIMARY 2
3 4 5
PINS 1 & 2 .052 (1.3) 2 .700 (17.78) TYP. 5 .250 (6.35) TYP. .250 (6.35) TYP.
PINS 3 - 5 .032 (0.8)
.150 (3.81) MIN.
Specifications subject to change without notice.
20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 * TEL: (949) 452-0511 * FAX: (949) 452-0512 * http://www.premiermag.com
1
RoHS
* High Current _ Primary Rated for 35 Amps RMS * Frequency Range from 50KHz to 500KHz
PM-CSXX CURRENT SENSE TRANSFORMERS
* Designed for automatic pick and place * Maximum height = 10mm
ELECTRICAL SPECIFICATIONS AT 25OC - OPERATING TEMPERATURE RANGE -40OC TO +130OC
PART NUMBER PM-CS21 PM-CS22 PM-CS23 PM-CS24 PM-CS25 PM-CS26
TURNS NS + 1%
SEC INDUCTANCE (mH Min.)
SEC DCR (Ohms Max.)
PRI CURRENT (Amps)
HIPOT (Vrms)
1 1 1 1 1 1
: 30 : 50 : 70 : 100 : 200 : 300
0.50 1.40 2.70 5.60 22.0 50.0
0.34 0.57 0.80 1.50 5.00 12.0
35 35 35 35 35 35
500 500 500 500 500 500
SCHEMATIC
MECHANICAL
11 1 TURN PRIMARY 12
2 SECONDARY
PHYSICAL Dimensions in inches (mm)
10
9
8
7
6
4
RECOMMEND LAYOUT
.090 (2.30) .100 (2.54) .050 (1.27)
P PM-CSXX M YYWW
PIN#1 I.D. WHITE DOT 1 2 3 4 5
.14 (3.5)
10
6
.27 (7.0)
9.65 (.38) MAX
.028 (0.70)
.27 (7.0) .61 (15.50)
.100 (2.54) 12.9 (.508)
12.9 (.508)
1
5
19.5 (4.95) MAX
Specifications subject to change without notice.
20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 * TEL: (949) 452-0511 * FAX: (949) 452-0512 * http://www.premiermag.com
2
RoHS
APPLICATION EXAMPLE APPLICATION EXAMPLE GIVEN: Part# = PM-CI02 Peak Current (IPK) = 30.0 Amps Terminating Resistor (RT) = 100 Ohms Operating Frequency (f) = 100KHz Duty Cycle (Dmax) = .40 (40% on time) CALCULATE OPERATING FLUX DENSISTY From the Table the FLUX FACTOR is: KB = 68.49 x 103 Flux Utilization Constant (K F) is: 1.0 For Unipolar Operation 2.0 For Bipolar Operation THEN: BOP = KB x IPK x RT x (Dmax / KF x f) = 68.49x103 x 30 x 100 x (.4 / 1 x 100x103) = 822 gauss (OK less than 2000 gauss)
PM-CSXX CURRENT SENSE TRANSFORMERS
CALCULATE THE SCALE FACTOR From the Table the Secondary Turns are: NS = 100 THEN: KV = RT / NS = 100 / 100 = 1 volt/amp
ESTIMATE ERROR DUE TO LOSSES From the Table the Secondary DCR is: RS = 1.40 Ohms Maximum From the Table the approximate Loss Factor is: KL = 3.33 x 10-9 Note: The loss factor (K L) is valid approximation from10KHz to 200KHz Secondary Copper Losses are: P_lossS = (IPK / NS )2 x RS = (30/100)2 x 1.40
CALCULATE PULSE DROOP From the Table the Secondary Inductance is: LS = 20mHy Minimum Note: The actual droop is dependent on the actual LS in the circuits enviorment. Droop Exponent (D) = RT x Dmax / (LS x f)
= 0.126 Watt Core losses are: P_lossC = KL2 x f1.621 x BOP2.569 = (3.33x10-9)2 x (100x103)1.621 x 8222.569 = 0.0435 Watt Output Power is:
= 100 x .4 / (20x10-3 x 100x103) P_out S = 0.020 = (30/100)2 x 100 THEN: %_Droop = (1-e-D) x 100 = 1.98 % OK less than 10% (Depending on the application Droop to 20% may be acceptable)
Specifications subject to change without notice.
= (IPK / NS )2 x RT
= 9.00 Watt THEN: %_Error
= [(P_lossS + P_lossC ) / P_out] x 100 = [(.126 + .0435) / 9] x 100 = 1.88 %
20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 * TEL: (949) 452-0511 * FAX: (949) 452-0512 * http://www.premiermag.com
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