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MIC2310 Evaluation Board

Single-FET, Constant Power-Limit

Hot Swap Controller

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

July 2008

M9999-070808-A

General Description

The MIC2310 is a single-channel, positive voltage,

constant power-limit hot swap controller designed to

provide for the safe insertion and removal of pc boards into

fixed, rack, and pedestal mid- or back-planes using few

external components. In addition, the MIC2310 employs a

patent-pending, output load power-limiting technique

where the current limit is inversely proportional to the

output load voltage, such that the power product will not

exceed the programmed power limit any longer than the

externally programmed primary overcurrent period. The

MIC2310 is ideally suited to address the power-limiting

and timing requirements per the UL60950 specification for

240-VA applications. The MIC2310 incorporates high-side

controller circuitry for an external N-channel MOSFET for

which the MOSFET drain current rate of change is user-

programmable via an external capacitor. The MIC2310

employs a dual-speed, dual-level overcurrent fault

protection where the secondary overcurrent detection level

is 2-bit user-programmable. The primary overcurrent

detector response time is programmable and the

secondary overcurrent detector exhibits a very fast

(default) response to faults to ensure that the system

power supplies are protected against catastrophic load

current and short-circuit faults. Additionally, an analog

output (voltage) signal is provided that is proportional to

the steady-state load current to allow monitoring of the

system’s power. A PWRGD signal is provided to indicate a

valid output voltage and PWRGD can also be used to

enable a DC-DC power module.

Ordering Information

Part Number Description

MIC2310-1ZTS EV

Evaluation board with the

MIC2310-1 device.

Evaluation Board General Description

The MIC2310 evaluation board demonstrates the

operation and features of the MIC2310, a Single-FET,

constant Power-Limit Hot Swap Controller. The MIC2310

evaluation board is capable of drawing up to 600W and

operates over a voltage range of 10.8V to 13.2V. The

current-limit configuration for the board is set by the

external sense resistor, R5. The standard board is

programmed for 20A to demonstrate a 240-VA application

utilizing the MIC2310-1ZTS option. The external LED

driver circuits are configured for the active-HIGH outputs

(PWRGD and I_FLT) of the MIC2310-1ZTS.

The board comes equipped with input/output power

connectors that are capable of passing up to 50A.

Additionally, 6-gauge power cables are recommended for

higher current (>25A) applications.

The MIC2310 has three digital output indicators to alert

users of fault (HW_FLT and I_FLT) and “Power-is-good”

status conditions. These outputs can be connected to

external LED drive circuits via shorting 2-terminal jumpers.

The schematic is shown in Figure 1 below and the top and

bottom side assembly diagrams, along with the rest of the

PCB layout files, are illustrated in Figures 2 and 3.

Powering the Board

The MIC2310 can be powered either by the high-current

cable lugs at the input (TS1, TS2) using 6-gauge copper

wire, or if evaluating at much lower current levels, the

evaluation board can be powered by the input terminal

pins for VCC and GND, TP9 and TP7, respectively. The

input voltage range for proper operation of the MIC2310 is

10.8V to 13.2V. Additionally, a second power rail is

generated (from the VCC supply) to power the LED drive

circuits for the output logic signals (HW_FLT, I_FLT, and

PWRGD). This power rail is labeled VLOGIC in the circuit

schematic.

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - MIC2310 Evaluation Board

MIC2310 Evaluation Board Single-FET, Constant Power-Limit Hot Swap Controller Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +

Page 2 - M9999-070808-A

Micrel, Inc. MIC2310 Evaluation Board July 2008 2 M9999-070808-A Output Turn-On and GATE Control (dID/dt or dVGATE/dt) With the input supply volta

Page 3 - Jumper Options

Micrel, Inc. MIC2310 Evaluation Board July 2008 3 M9999-070808-A condition lasting longer than the programmed tPOC or immediately for an overcurre

Page 4 - Evaluation Board Schematic

Micrel, Inc. MIC2310 Evaluation Board July 2008 4 M9999-070808-A Evaluation Board Schematic +VCCGND Figure 1. MIC2310 Schematic

Page 5 - Bill of Materials

Micrel, Inc. MIC2310 Evaluation Board July 2008 5 M9999-070808-A Bill of Materials Item Part Number Manufacturer Description Qty. C1, C9, C10, C

Page 6 - July 2008

Micrel, Inc. MIC2310 Evaluation Board July 2008 6 M9999-070808-A Notes: 1. Panasonic: www.panasonic.com/industrial/components/components.html 2

Page 7 - PCB Layout Recommendations

Micrel, Inc. MIC2310 Evaluation Board July 2008 7 M9999-070808-A PCB Layout Recommendations Figure 2. Top Layer Overlay Figure 3. Top Laye

Page 8 - Figure 4. Bottom Layer

Micrel, Inc. MIC2310 Evaluation Board July 2008 8 M9999-070808-A Figure 4. Bottom Layer MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95

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Browse online or download User Manual for Audio amplifiers Vishay 2310. mic2310_eb243.33 KB

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