|
|
Part: MAX4273EVKIT
Category:
Power Management
-> Battery Management
Description: MAX4273EVKIT Evaluation Kit For The MAX4273
Company: Maxim Integrated Products
Datasheet: Download MAX4273EVKIT datasheet File size : 416 kB
Request For quote: Find where to buy MAX4273EVKIT
Datasheet text preview:
19-1944; Rev 0; 1/01
MAX4273 Evaluation Kit
General Description
The MAX4273 evaluation kit (EV kit) is a fully assembled and tested surface-mount hot-swap controller circuit board that provides current-limiting and DualSpeed/BiLevelTM fault protection. The circuit uses a MAX4273 IC i n a 16-pin QSOP package and is configured for a +2.7V to +13.2V input voltage range. T h e MAX4273 controls the N-channel MOSFET and provides current regulation during startup. Several configurations allow the MAX4273 IC's unique current regulation architecture to be tailored to the application. The current-limiting and short-circuit protection features are configurable and demonstrate the various features provided by the MAX4273 IC. T h e EV kit features a power-on reset (POR) circuit. Several configurations for autoretry, glitch filters, auxiliary VCC power, and gate drive speed are provided. The EV kit can also be reconfigured to emulate the MAX4271 and MAX4272 hot-swap controllers. o +2.7V to +13.2V Input Range o Output Configured for +5V (Configurable from +2.7V to +13.2V) o Up to 10A Capability (as Configured) o Demonstrates Unique Current-Regulation Architecture o Auxiliary VCC Feature o Power-On Reset Circuit o Configurable Autoretry o Adjustable N-Channel MOSFET Gate Charging Time o Configurable Glitch Filters o Also Emulates MAX4271 and MAX4272 Hot-Swap Controllers o Surface-Mount Components o Fully Assembled and Tested
DualSpeed/BiLevel is a trademark of Maxim Integrated Products.
Features
Evaluates: MAX4273
Ordering Information
PART MAX4273EVKIT TEMP. RANGE 0°C to +70°C IC PACKAGE 16 QSOP
Component List
DESIGNATION C1, C12 QTY 2 DESCRIPTION 1.0µF, 16V X5R ceramic capacitors (0805) Taiyo Yuden EMK212BJ105KG 0.1µF, 50V X7R ceramic capacitors (0805) Taiyo Yuden UMK212BJ104KG 3300pF, 50V ceramic capacitor (0603) Taiyo Yuden UMK107BJ332KZ 0.068µF, 50V X7R ceramic capacitor (0805) Taiyo Yuden UMK212BJ683KG 1000µF, 16V OS-CON capacitor (H case) Sanyo 16SA1000M DESIGNATION C7, C8 QTY 0 DESCRIPTION Not installed (F12 case) Sanyo 16SV220M recommended 0.22µF, 35V X7R ceramic capacitor (0805) Taiyo Yuden GMK212BJ224KG 0.01µF, 50V X7R ceramic capacitors (0603) Taiyo Yuden UMK107 B103KZ Not installed, (H case) Sanyo 16SA1000M recommended 330pF, 50V X7R ceramic capacitor (0603) Murata GRM39X7R331K050
C2, C3
2
C9
1
C4
1
C10, C13
2
C5
1
C11
0
C6
1
C14
1
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX4273 Evaluation Kit Evaluates: MAX4273
Component List (continued)
DESIGNATION R1, R4, R5 R2, R7 R3 R6 R8 QTY 3 2 1 1 0 DESCRIPTION 1M ±5% resistors (0805) 10k ±1% resistors (0805) 0.004 ±1% 1W power resistor Dale WSL2512 0.004 ±1% R86 IRC OARS-1-4m 64.9k ±1% resistor (0805) Not installed, resistor (0805) 30V, 100A N-channel MOSFET (D2PAK) Fairchild FDB7030L or International Rectifier IRL3803S Uninsulated banana jacks Mouser 530-108-0740-1 2-pin headers 3-pin headers 4-pin header Shunts (JU1JU7) Rubber bumpers 3M SJ-5003 MAX4273EEE (16-pin QSOP) MAX4273 data sheet MAX4273 EV kit data sheet
MAX4273 Configuration +5V, 10A Output
1) Verify that shunts are on jumpers JU4 (CSPD), JU5 (AUXVCC), and JU7 (CTON). 2) Verify that jumper JU1 (ON) does not have a shunt installed. 3) Verify that jumper JU3 (RTH) has a shunt installed on pins 1 and 3. 4) Verify that a shunt is installed on pins 2 and 3 of jumper JU2 (CTIM) and on pins 1 and 2 of jumper JU6 (GATE). 5) U t i l i z i n g very short 10A rated banana leads (<6in long), connect the +5VDC power supply to t h e V I N p a d . Utilizing very short 10A rated b a n a n a leads (<6in long), connect the supply ground to the GND pad. 6) Connect a voltmeter to the VOUT and GND pads. 7) Turn on the power supply and verify that the voltage at VOUT is +5V. 8) Test point 1 (TP1) is provided to observe the MOSFET gate voltage with an oscilloscope. Note: The banana leads connecting the power supply and the load to the EV kit must be very short (<6in long) and rated for at least 10A of current.
N1
1
J1J4 JU1, JU4, JU5, JU7 JU2, JU6 JU3 None None U1 None None
4 4 2 1 7 4 1 1 1
Detailed Description
The MAX4273 EV kit is a hot-swap controller circuit board that provides configurable current-limiting and bilevel fault protection for the output. The bilevel fault p r o t e c t i o n provides low-amplitude current-overload p r o t e c t i o n and protection from instantaneous faults such as a short-circuit condition. The circuit uses a MAX4273 IC, configured for an input range of +5V to +13.2V, and can pass up to 10A of current to the output. The input feeds a current-sense resistor and Nchannel MOSFET, which controls current between the input and output of the EV kit. The MAX4273 IC controls the N-channel MOSFET in conjunction with gate capacitors, which provide current regulation during startup and bilevel fault protection during steady-state operation. A jumper to capacitors and a resistor allow control of the MOSFET gate charging time. A test point is provided to verify the gate signal with an oscilloscope. The MAX4273 EV kit features a POR that will trip when the input voltage drops by 10%. The autoretry, glitch filters, and auxiliary Vcc power have jumpers that allow easy configuration changes. Through proper selection of jumpers, the EV kit can emulate the MAX4271 and
Component Suppliers
SUPPLIER Dale/Vishay Fairchild International Rectifier IRC Murata Sanyo USA Taiyo Yuden PHONE 402-564-3131 408-822-2000 310-322-3331 512-992-7900 814-237-1431 619-661-6835 408-573-4150 FAX 402-563-6418 408-822-2102 310-322-3332 512-992-3377 814-238-0490 619-661-1055 408-573-4159
Note: Please indicate that you are using the MAX4273 when contacting these component suppliers.
Quick Start
The MAX4273 EV kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed.
2
_______________________________________________________________________________________
MAX4273 Evaluation Kit
M A X 4 2 7 2 hot-swap controllers. PC board pads for extra output capacitors are provided on the EV kit.
Evaluates: MAX4273
Table 3. Jumper JU3 Functions
SHUNT LOCATION 1, 4 RTH PIN FAST COMPARATOR Fast comparator and current regulation disabled 200mV internal threshold 100mV threshold
Jumper Selection
T a b l e s 17 display the functions provided by the MAX4273 EV kit. MOSFET Enable and Fault Resetting The MAX4273 EV kit features a combination shutd o w n / u n l a t c h f a u l t mode. The 2-pin jumper, JU1, selects the shutdown/unlatch mode for the MAX4273 EV kit. Table 1 lists the selectable jumper options.
Connected to VIN
1, 2 1, 3
Connected to GND Connected to R2
Table 1. Jumper JU1 Functions
SHUNT LOCATION Installed ON PIN ON pin pulled low EV KIT OUTPUT Disable MOSFET N1, unlatch fault Enable MOSFET N1, normal operation*
Slow Comparator Response Time The MAX4273 EV kit features two choices for the slow comparator response time. The 2-pin jumper, JU4, is used to select other speed settings. Table 4 lists the selectable jumper options.
Table 4. Jumper JU4 Functions
SHUNT LOCATION Installed CSPD PIN Connected to C2 and C10 SLOW COMPARATOR 22ms slow comparator response time 2ms slow comparator response time
None
ON pin pulled high
*If JU2 is set for latched mode, the device will be latched following a fault condition.
ON Pin and Latched and Retry Modes The MAX4273 EV kit features a jumper to select latched mode or retry timer settings. The 3-pin jumper, JU2, selects the retry time for the MAX4273 IC. Table 2 lists the various jumper options.
None
Connected to C10
Table 2. Jumper JU2 Functions
SHUNT LOCATION 1, 2 2, 3 None CTIM PIN Connected to VIN Connected to C3 and C13 Connected to C13 EV KIT MODE Latched mode Retry mode, 1.1s
Auxiliary VCC Power The MAX4273 EV kit features an auxiliary supply for VCC. A capacitor on the auxiliary supply pin provides energy to the IC during a short-circuit fault condition, which could cause the main system power supply to collapse. The 2-pin jumper, JU5, enables or disables the feature by connecting or disconnecting the capacitor. Table 5 lists the selectable jumper options.
Table 5. Jumper JU5 Functions
Retry mode, 100ms SHUNT LOCATION Installed AUXVCC PIN AUXVCC pin connected to C1 AUXVCC pin floating EV KIT MODE Auxiliary supply connected Auxiliary supply disconnected
Fast Comparator and Current Regulation The MAX4273 EV kit features a jumper to enable or disable the fast comparator and to set the threshold level. T h e 3-pin jumper, JU3, selects the threshold level. Table 3 lists the jumper options.
None
_______________________________________________________________________________________
3
Others parts begin by ma
|
|
|
