Freescale Semiconductor KIT33730EKEVBE Manuale utente

Freescale Semiconductor

User’s Guide

Document Number: KT33730UG

Rev. 1.0, 9/2009

KIT33730EKEVBE Evaluation Board

Figure 1. KIT33730EKEVBE Evaluation Board

Table of Contents

1 Kit Contents / Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 Important Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4 Using Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6 KIT33730EKEVBE Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7 KIT33730EKEVBE Evaluation Board Bill of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

KIT33730EKEVBE Evaluation Board, Rev. 1.0

2Freescale Semiconductor

Kit Contents / Packing List

1 Kit Contents / Packing List

• KIT33730EKEVBE evaluation board

• CD33730EKEVBE

KIT33730EKEVBE Evaluation Board, Rev. 1.0

Freescale Semiconductor 3

Important Notice

2 Important Notice

Freescale provides the enclosed product(s) under the following conditions:

This evaluation kit is intended for use of ENGINEERING DEVELOPMENT OR EVALUATION

PURPOSES ONLY. It is provided as a sample IC pre-soldered to a printed circuit board to make it

easier to access inputs, outputs, and supply terminals. This EVB may be used with any development

system or other source of I/O signals by simply connecting it to the host MCU or computer board via

off-the-shelf cables. This EVB is not a Reference Design and is not intended to represent a final

design recommendation for any particular application. Final device in an application will be heavily

dependent on proper printed circuit board layout and heat sinking design as well as attention to

supply filtering, transient suppression, and I/O signal quality.

The goods provided may not be complete in terms of required design, marketing, and or

manufacturing related protective considerations, including product safety measures typically found

in the end product incorporating the goods. Due to the open construction of the product, it is the

user's responsibility to take any and all appropriate precautions with regard to electrostatic

discharge. In order to minimize risks associated with the customers applications, adequate design

and operating safeguards must be provided by the customer to minimize inherent or procedural

hazards. For any safety concerns, contact Freescale sales and technical support services.

Should this evaluation kit not meet the specifications indicated in the kit, it may be returned within 30

days from the date of delivery and will be replaced by a new kit.

Freescale reserves the right to make changes without further notice to any products herein.

Freescale makes no warranty, representation or guarantee regarding the suitability of its products

for any particular purpose, nor does Freescale assume any liability arising out of the application or

use of any product or circuit, and specifically disclaims any and all liability, including without limitation

consequential or incidental damages. “Typical” parameters can and do vary in different applications

and actual performance may vary over time. All operating parameters, including “Typical”, must be

validated for each customer application by customer’s technical experts.

Freescale does not convey any license under its patent rights nor the rights of others. Freescale

products are not designed, intended, or authorized for use as components in systems intended for

surgical implant into the body, or other applications intended to support or sustain life, or for any other

application in which the failure of the Freescale product could create a situation where personal

injury or death may occur.

Should Buyer purchase or use Freescale products for any such unintended or unauthorized

application, Buyer shall indemnify and hold Freescale and its officers, employees, subsidiaries,

affiliates, and distributors harmless against all claims, costs, damages, and expenses, and

reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that Freescale was

negligent regarding the design or manufacture of the part.Freescale™ and the Freescale logo are

trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of

their respective owners. © Freescale Semiconductor, Inc. 2009

KIT33730EKEVBE Evaluation Board, Rev. 1.0

4Freescale Semiconductor

Introduction

3 Introduction

KIT33730EKEVBE Evaluation Board (EVB) is an easy-to-use circuit board used to exercise all the

functions of the MC33730 multiple output switching power supply. The EVB can be used to easily

manipulate the MC33730 functions and validate the capabilities of the IC. The board provides

connections that allow the user to supply MPCxx MCUs via hard wired connections.

3.1 EVB Features

• Provides all regulated voltages for MPC5XX MCUs and other MCUs logic and analog functions

• Adjustable frequency switching buck regulator with slew-rate control provided by jumpers

• Power sequencing provided

• Programmable voltages VDDL, VDD3 - 3% accuracy (P1, P2, and P3 jumpers)

• Programmable standby regulator VKAM - (P1, P2, and P3 jumpers) operating down to 4.5V at

KA_VBAT pin

• VDD3 can be programmed as an optional second standby regulator (P1, P2, and P3 jumpers)

• Provides two 5.0V protected supplies for sensors

• Provides reverse battery protection FET gate drive (either a diode or PFD gate drive)

• Provides necessary MCU monitoring and fail-safe support

• Pb-free packaging designated by suffix code EK

3.2 Required Equipment

Minimum required equipment: Power supply: 4.5 to 26.5V

KIT33730EKEVBE Evaluation Board, Rev. 1.0

Freescale Semiconductor 5

Using Hardware

4 Using Hardware

This EVB consists of a MC33730 switching power supply, power conditioning circuitry, and a set of Input

Select Jumpers. MC33730 Circuit.

4.1 LED Display

Seven LED's are provided as visual output devices for the MC33730 EVB board. A list of the LED devices

is shown below:

1. VDDH LED - Indicates when VDDH supply is operating.

2. VDDL LED - Indicates that the VDDL supply is operating.

3. VDD3 LED - Indicates that the VDD3 supply is operating.

4. VREF1 LED - Indicates that the VREF1 reference is operating.

5. VREF2 LED - Indicates that the VREF2 reference is operating.

6. IGN LED - Indicates Battery supplied to Vign.

7. IGNSW LED - Indicates that the VDD3 supply is operating.

4.2 Selection Jumper Definitions

The EVB contains four jumpers that provide certain selections for the MC33730 as follows (Bold = default

factory setting):

4.2.1 P1, P2, P3 Jumpers

The P1, P2, and P3 jumpers are used to determine what voltage levels will be supplied by the VDD3,

VDDL and VKAM supplies. The pins are used to hardwire the settings with the MC33730 reading the

values at startup. The table below shows the various conditions that can be set.

P1 P2 P3 VDD3 VDDL VKAM

High High High 3.3V 2.6V 2.6V

High High Low 3.3V 3.3V 3.3V

High Low High 3.3V 1.5V 1.0V

High Low Low 3.3V 3.3V 1.0V

Low High High 3.3V Standby 3.3V 1.0V

Low High Low 2.0 3.15V 5.0V

Low Low High 2.6V Standby 3.3V 1.0V

Low Low Low 2.6V Standby 3.3V 1.5V

KIT33730EKEVBE Evaluation Board, Rev. 1.0

6Freescale Semiconductor

Using Hardware

4.2.2 VDD3 Jumper

In the state where VDD3 is desired to be in standby, the VDD3 jumper is used to short the Base of the

VDD3 transistor to ground. The default case (Normal) is to leave the base connected to VDD3_B.

Jumper should be connected to Normal except for the cases where P1, P2, and P3 are as follows:

4.2.3 Slew Rate (SR) Jumper

The Slew Rate Control Jumper Allows For Configurable Slew Rates For The Switching Regulator.

Connected To Boot The Slow Slew Rate Is Active And Connected To Sw The Fast Slew Rate Is Selected.

The Pin Can Be Left Open Which Results In The Medium Slew Rate Control.

Setup Pins

The 33730 has multiple pins used to do initial setup for the IC. When the IC is powered up a series of

checks are done to determine the P1, P2, P3, HRT, SR and FREQ state.

The P1, P2, and P3 states are connected to jumpers to allow the user to configure the supply rails easily.

Once the IC has determined their state at startup, the status is latched into registers and changing the

jumpers does not affect the operation until the next POR or start up occurs.

The HRT pin is set to 10k. The resistor connected to HRT is R1.

The SR state is determined by the SR jumper. The slew rate of the switching regulator can be selected

to range from slow, medium and fast depending on the location (or open) of the jumper.

The FREQ pin is connected to ground via a 10kohm resistor. This pin resistance to ground determines

the frequency operation of the switching regulator. The resistor connected to FREQ is R9.

Output Supply Pins

There are multiple output power supplies integrated into the integrated circuit.

The main switching regulator, VDDH, uses a fixed frequency PWM voltage mode control. It has a 3.5A

current limit (typical) and the slew-rate is adjustable via a control pin to reduce switching noise. The

switching regulator has an adjustable frequency oscillator, which allows the user to optimize its operation

over a wide range of input voltages and component values. The VDDH regulator supplies a 5v rail and is

used as the internal power supply for VREF1 and VREF2 along with the external rail for VDD3 and VDDL.

Associated with the VDDH regulator is the INV and VCOMP pins which have been connected to optimize

the compensation for the step down regulator. A bootstrap capacitor is connected from the VSW pin to

the BOOT pin.

The linear regulators can be configured either as two normal mode regulators (VDD3, VDDL) and one

standby regulator (VKAM), or as one normal mode linear regulator (VDDL) and two standby regulators

(VKAM and VDD3 Standby). Two protected outputs, VREF1 and VREF2, are used to provide power to

external sensors.

P1 P2 P3 VDD3

Low High High 3.3V Standby

Low Low High 2.6V Standby

Low Low Low 2.6V Standby

SR CONDITION FOR SLEW RATE

Boot Slow Slew rate

Open Medium Slew rate

SW Fast Slew rate

KIT33730EKEVBE Evaluation Board, Rev. 1.0

Freescale Semiconductor 7

Using Hardware

All of the output supplies have been brought out to two sets of connectors. The SV1 is available to monitor

the output voltages while SV3 is designed to connect to the loads or a micro motherboard.

The SV1 connector is pinned out as follows:

The SV3 connector is pinned out as follows:

The SV3 connector also contains a number of other pin functions including the reset pins, the REGON

pin and the IGN_ON and IGN pins.

PIN NODE

1AGND

2VREF2

3VREF1

4VKAM

5N/C

6VDDH

7VDDL

8VDD3

PIN NODE

1Battery

2Battery

3VDDH

4VDDH

5VDD3

6VDD3

7VDDL

8VDDL

9N/C

10 AGND

11 VKAM

12 RST3

13 VDDA

14 RSTKAM

15 VREF1

16 RSTL

17 VREF2

18 RSTH

19 N/C

20 REGON

21 IGN_ON

22 IGN

23 KA

24 AGND

25 AGND

26 AGND

KIT33730EKEVBE Evaluation Board, Rev. 1.0

8Freescale Semiconductor

Using Hardware

4.2.4 MC33730 EVB Setup

To use the evaluation board the Battery connection must be made to the +12v and GND connector. Turn

on the power supply and ensure the voltage is in the normal operating range.

To apply IGN, move the slider switch to the On position (slider toward Battery connection). Ensure the

IGN_ON and IGNSW LED's are lit.

The LED's for the voltage rails will also turn on and the user can monitor the voltages and apply loads via

the connectors.

Note: The silkscreen on the PCB board is incomplete, please see Assembly Drawing on page 11 for the

complete silkscreen.

KIT33730EKEVBE Evaluation Board, Rev. 1.0

Freescale Semiconductor 9

Schematic

5 Schematic

Figure 2. The MC33730 Schematic of the KIT33730EKEVBE Evaluation Board

KIT33730EKEVBE Evaluation Board, Rev. 1.0

10 Freescale Semiconductor

KIT33730EKEVBE Board Layout

6 KIT33730EKEVBE Board Layout

6.1 Top Layer

Figure 3. The Top Layer of the KIT33730EKEVBE Evaluation Board

6.2 Second Layer

Figure 4. Top Layer of the KIT33730EKEVBE Evaluation Board

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