33937A_11 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

33937A_11

Three Phase Field Effect Transistor Pre-driver

Freescale Semiconductor 

REVISION

1.0

2.0

DATE

6/2008

7/2008

3.0

11/2008

4.0

12/2008

5.0

4/2009

6.0

9/2009

7.0

3/2011

8.0

8/2012

REVISION HISTORY

REVISION HISTORY

DESCRIPTION OF CHANGES

• Initial Release

• Updated specifications for current sense amplifier and overcurrent comparator

• Added Gain/Phase curves for current sense amplifier

• Added typical curves for load margin on Px_CBOOT

• Added discussion about bootstrap capacitors and requirements for external bootstrap diodes

• Updated application drawings

• Added VSUP requirement for hold-off

• Updated Freescale form and style

• Added note to VLS Regulator Outputs (VLS, VLS_CAP)

• Changed Charge Device Model - CDM

• Corrected title to No output loads on Gate Drive Pins, No PWM, Outputs initialized

• Changed In order to achieve a 100% duty cycle operation of the High Side external FETs, a fully

integrated trickle charge pump provides the charge necessary to maintain the external FET gates

at fully enhanced levels. The trickle charge pump has limited ability to supply external leakage paths

while performing it’s primary function. The graph in Figure 11 shows the typical margin for supplying

external current loads. These limits are based on maintaining the voltage at CBOOT at least 3.0 V

greater than the voltage on the HS_S for that phase. If this voltage differential becomes less than

3.0 V, the corresponding high side FET will most likely not remain fully enhanced and the high side

driver may malfunction due to insufficient bias voltage between CBOOT and HS_S. and associated

paragraphs

• Added PCZ33937AEK/R2 Part number throughout.

• Added Note and changed parameters for Desaturation Detector and Phase Comparator to

Dynamic Electrical Characteristics Table.

• Replaced Typical Application Diagrams (Pages 40 and 41).

• Page 10 remove VDD Threshold (VDD Falling) change note 23

• Note 41 clarification.

• Changed part number from PCZ33937A to MCZ33937A on page 1. Added Device Variation table

on page 2.

• Revised per Specific customer requirements (not published)

• Removed part number MCZ33937AEK and replaced with part number MC33937APEK.

• Removed part number MCZ33937EK/R2 and specific differences. Noted in ordering information to

see specification MC33937 Rev 6.0 for obsolete parts.

Analog Integrated Circuit Device Data

Freescale Semiconductor

33937A

47

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