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ZXCT1041 EV1
ZXCT1041EV1 EVALUATION BOARD USER GUIDE
DESCRIPTION
The ZXCT1041EV1 is intended for the evaluation of the
ZXCT1041 device. The ZXCT1041 is a high side bi-
directional current monitor providing a fixed voltage gain
of 10.
The device produces a voltage output proportional to the
current sampled by a small inline sensing resistor, R
The voltage output is scaled by the choice of R
delivered the board is set up to provide an out put of 1.5V
from a current of 1.5A using a 100 mΩ sampling resistor.
FEATURES
•
Supply Range 4.2 to 20V for 1.5V output.
•
Selectable current measurement range
•
5 Pin SOT23-5 package
Zdb341R2. 26-Feb-07
There is a second 25 mΩ resistor that can be selected
by means of a solder link and provides an output of
1.5V for a load current of 6A.
Additionally provision is made for a wire ended
.
sampling resistor of the users choice. An open
sense
. As
collector flag output
sense
flow.
The printed circuit board is common to other devices in
the ZXCT family, for the ZXCT1041, the Vcc pin is not
used.
APPLICATIONS
•
Battery Charging
•
Power Supplies
•
Over Current Monitoring
1/8
ZXCT1041 EV1 User Guide Rev2
indicates the direction of current
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Summary of Contents for Zetex ZXCT1041 EV1
- Page 1 ZXCT family, for the ZXCT1041, the Vcc pin is not used. FEATURES APPLICATIONS • • Supply Range 4.2 to 20V for 1.5V output. Battery Charging • • Selectable current measurement range Power Supplies • • 5 Pin SOT23-5 package Over Current Monitoring Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2...
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Page 2: Ordering Information
The input voltage range for the ZXCT1041EV1 is 20V down to a minimum of (2.7V +Vout). Eg if the required full scale output voltage is 1.5 V the input range is 4.2V to 20V. Note that the Flag output requires a pull-up resistor. Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2... - Page 3 1.25V for a 5.0A load current. The output is directly proportional to the differential voltage across the sense pins of the device. The ZXCT1041 will output the same voltage for current flow in either direction, but the level of the Flag output will change. Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2...
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Page 4: Load Current
COMPONENTS LIST Value Package Part Number Manufacturer Notes 1206 LR1206-R10FI SMD Sense Resistor 1% 100mΩ Welwyn 2512 LRF2512-R025FW SMD Sense Resistor 1% 25mΩ Welwyn 0805 SMD 1% 0.125W 30kΩ Generic ZXCT SOT235 ZXCT1041E5 ZETEX Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2... -
Page 5: Set-Up And Test
The device may also be evaluated with lower power loads and lower currents by increasing the value of As the device reacts only to the voltage across this resistor such tests are equally valid. sense. Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2... -
Page 6: Connection Diagram
ZXCT1041 EV1 CONNECTION DIAGRAM Forward Current flow CURRENT MONITOR EVALUATION BOARD ZXCT1041EV1 FLAG VOUT 10 Ω CONNECTION DIAGRAM……continued Reverse Current flow CURRENT MONITOR EVALUATION BOARD ZXCT1041EV1 FLAG VOUT 10 Ω Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2... -
Page 7: Evaluation Board
ZXCT1041 EV1 EVALUATION BOARD CURRENT MONITOR EVALUATION BOARD www.zetex.com FLAG ZXCT Vout R4 C1 Refer to 'User Guide' for details. Bare board: ZDB341R2 Copyright Zetex PLC 2006 Top Silk Top Copper Zdb341R2. 26-Feb-07 ZXCT1041 EV1 User Guide Rev2... - Page 8 Terms and Conditions All products are sold subjects to Zetex’ terms and conditions of sale, and this disclaimer (save in the event of a conflict between the two when the terms of the contract shall prevail) according to region, supplied at the time of order acknowledgement.