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19-2644; Rev 0; 10/02
MAX1563 Evaluation Kit
General Description
The MAX1563 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX1563 (4mm x 4mm thin QFN) programmable 4A USB switch. The EV kit includes on-board shutdown control that can be set for active-high or active-low logic. The EV kit PC board also includes a separate layout to evaluate the MAX1562 3A 8-pin SO. o 4V to 5.5V Single-Supply Operation o On-Board Shutdown Control o Evaluates Both MAX1563 (Thin QFN) and MAX1562 (SO) o Fully Assembled and Tested Surface-Mount Board
Features
Evaluates: MAX1562/MAX1562H/MAX1563
Component List
DESIGNATION C1 QTY 1 DESCRIPTION 1F 20%, 10V X7R ceramic capacitor (0805) TDK C2012X7R1A105M 4.7F 20%, 6.3V X5R ceramic capacitor (0805) TDK C2012X5R0J475M Not installed (0805) 47F 20%,16V tantalum capacitor (D case) AVX TAJD476M016 Not installed (D case) 100k 5% resistor (0603) 5.76k 1% resistor (0603) Not installed (0805) Jumpers, SIP-3, 3-pin headers Not installed (SIP-3) Programmable 4A USB switch 12-pin thin QFN Maxim MAX1563ETC Not installed, 8-pin SO Shunts MAX1563 PC board PART MAX1563EVKIT
Ordering Information
TEMP RANGE 0C to +70C IC PACKAGE 12 QFN
Note: To evaluate the MAX1562, request a MAX1562ESA or a MAX1562HESA free sample with the MAX1563EVKIT.
C2 C3, C4 C5 C6 R1 R2 R3, R4 JU1, JU2 JU3 U1 U2 None None
1 2 1 1 1 1 2 2 1 1 1 2 1
Quick Start
Recommended Equipment
The following is required before beginning: * One variable DC power supply capable of supplying between 4V and 5.5V at 4A * One electronic load capable of sinking up to 4A * Two voltmeters
Procedure
The MAX1563 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Set the variable DC power supply to 5V. 2) Ensure that the variable DC power supply is turned off. 3) Connect the positive terminal of the variable DC power supply to the pad marked IN. Connect the ground return of the variable DC power supply to the corresponding ground (GND) pad.
Component Suppliers
SUPPLIER AVX TDK PHONE 843-946-0238 847-803-6100 FAX 843-626-3123 847-390-4405 WEBSITE www.avxcorp.com www.component.tdk.com
Note: Please indicate that you are using the MAX1563 when contacting these component suppliers.
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX1563 Evaluation Kit Evaluates: MAX1562/MAX1562H/MAX1563
4) Set the electronic load to draw 2A. 5) Ensure that the electronic load is turned off. 6) Connect the positive terminal of the electronic load to the pad marked OUT. Connect the ground return of the electronic load to the corresponding ground (GND) pad. 7) Connect the positive terminal of the first voltmeter to the pad marked FAULT. Connect the ground return of the voltmeter to the pad marked GND (located by the IN pad). 8) Connect the positive terminal of the second voltmeter to the pad marked OUT. Connect the ground return of the voltmeter to the corresponding ground (GND) pad. 9) Ensure that shunts are installed across pins 1 and 2 of jumpers JU1 (enable switch) and JU2 (set activehigh logic). 10) Turn on the variable DC power supply. 11) Turn on/enable the electronic load. 12) Verify with the first voltmeter that an output voltage of approximately 5V is produced between the FAULT pad and the GND pad (fault condition not present). 13) Verify with the second voltmeter that an output voltage of 5V is produced between the OUT pad and the GND pad. 14) Increase the electronic load current draw to 4A. 15) Verify with the first voltmeter that an output voltage of 0V is produced between the FAULT pad and the GND pad (fault condition present). 16) Verify with the second voltmeter that an output voltage of 0V is produced between the OUT pad and the GND pad (output has turned off in response to overload condition) 17) Disconnect the electronic load and verify that the output voltage returns to 5V. The MAX1563 EV kit is laid out as a dual board with separate ground planes for the MAX1563 12-pin QFN and the MAX1562 8-pin SO. The MAX1563 EV kit incorporates a 20ms fault-blanking feature that allows momentary faults (such as those caused when hot swapping into capacitive loads) to be ignored, thus preventing false alarms to the host system. The fault output of the MAX1563 can be monitored at the FAULT pad. If an output fault is detected for more than the blanking time (20ms, typ), then that output is latched off and a 25mA (typ) current is forced at that output. If the voltage on that output is continuously above 0.5V (typ) for 20ms (typ), then the fault is reset and the output is turned back on. The voltage on the output is monitored so that a short-circuit condition can be detected. Active loads are not expected to have measurable currents when the supply is below 0.5V. The MAX1562/MAX1652H/MAX1563 family can also be reset from fault manually by toggling the ON signal.
Input Bulk Capacitor (C5/C6)
The EV kit is supplied with a 47F bulk input capacitor to stabilize input power sources that may have poor output impedance, high inductance, and/or long output leads. When driving inductive loads or operating from inductive sources, which may occur when the MAX1563 is powered by long leads, the increased capacitance is required to prevent voltage spikes from exceeding the MAX1563's absolute maximum ratings during short-circuit events. This capacitor is normally not required in the final application, where the input power source is not remotely located.
ON Selection
Jumper JU1 controls the active-high/active-low selection pin (SEL) of the MAX1563, which alters the functionality of the ON pin. Removing the shunt from JU1 allows the SEL pin to be driven with an external signal source connected to the SEL pad. See Table 1 for shunt positions.
Detailed Description
The MAX1563 EV kit is a fully assembled and tested surface-mount circuit board that evaluates the MAX1563 (4mm x 4mm thin QFN) programmable 4A USB switch. The EV kit includes on-board shutdown control that can be set for active-high or active-low logic. The EV kit can also be used to evaluate the MAX1562 (8-pin SO) programmable 3A USB switch.
Table 1. SEL Selection
JUMPER JU1 JU1 JU1 SHUNT POSITION 1-2 2-3 Not installed DESCRIPTION ON = Active high ON = Active low SEL pin driven by an external signal source
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MAX1563 Evaluation Kit
MAX1563 ON Pin
Jumper JU2 controls the enable pin (ON) of the MAX1563, which enables/disables the output (OUT). Removing the shunt from JU2 allows the ON pin to be driven with an external signal source connected to the ON pad. Device functionality relating to the ON pin is dependent on the voltage at the SEL pin and thus JU1. See Table 2 for enable shunt positions. 5) Install a 100k resistor into position R3. 6) Install a 47F capacitor into position C6. 7) Install a 3-pin jumper into position JU3. 8) Install a shunt on jumper JU3 (see MAX1562 ON pin for shunt positions). MAX1562 ON pin Unlike the MAX1563, which has a selectable activehigh/low ON pin, the MAX1562's ON pin is active low while the MAX1562H's ON pin is active high. Access the ON pin through JU3 or the pad labeled ON2. See Tables 3 and 4 for ON shunt positions.
Evaluates: MAX1562/MAX1562H/MAX1563
Table 2. Shutdown Selection
JUMPER JU1 JU2 JU1 JU2 JU1 JU2 JU1 JU2 SHUNT POSITION 1-2 1-2 1-2 2-3 2-3 1-2 2-3 2-3 DESCRIPTION ON = Active high output enabled ON = Active high output disabled ON = Active low output disabled ON = Active low output enabled
Table 3. ON Selection (MAX1562)
JUMPER JU3 JU3 JU3 SHUNT POSITION 1-2 2-3 Not installed DESCRIPTION Output disabled Output enabled ON pin driven by an external signal source
Adjusting the USB Current Limit
Resistor R2 sets the current limit of the MAX1563. To alter the current limit from the default value of 3A, replace resistor R2 with a value calculated by the following equation: R2 = K ILIMIT
Table 4. ON Selection (MAX1562H)
JUMPER JU3 JU3 JU3 SHUNT POSITION 1-2 2-3 Not installed DESCRIPTION Output enabled Output disabled ON pin driven by an external signal source
where: ILIMIT = desired current limit K = 17120
Evaluating the MAX1562
Populating the MAX1562 Layout The MAX1563 EV kit includes a second layout for evaluating the MAX1562. To evaluate the MAX1562, perform the following steps: 1) Install a MAX1562ESA or a MAX1562HESA into position U2. 2) Install a current-limit set resistor (see the Adjusting the USB Current Limit section) into position R4. 3) Install a 1F capacitor into position C3. 4) Install a 4.7F capacitor into position C4.
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MAX1563 Evaluation Kit Evaluates: MAX1562/MAX1562H/MAX1563
IN C5 47F 16V C1 1F
9 12 R1 100k FAULT SEL 1 2 3 JU1 8
IN IN N.C.
GND
OUT OUT N.C. N.C. U1 MAX1563
1 10 2 11 C2 4.7F
OUT
GND
5 3
FAULT SEL
ON
1 2 3
JU2
4 7 R2 5.76k 1%
ON ISET GND 6
IN2 C6 OPEN GND2 C3 OPEN
5 7
IN IN
OUT OUT
8 6 C4 OPEN
OUT2
R3 OPEN FAULT2
GND2
2
FAULT
U1 MAX1562(H)
1 ON2 2 3 R4 OPEN JU3 1 4 ON (ON) ISET GND 3
Figure 1. MAX1563 EV Kit Schematic
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MAX1563 Evaluation Kit Evaluates: MAX1562/MAX1562H/MAX1563
Figure 2. MAX1563 EV Kit Component Placement Guide-- Component Side
Figure 3. MAX1563 EV Kit PC Board Layout--Component Side
Figure 4. MAX1563 EV Kit PC Board Layout--Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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