ZAMC4100 datasheet(65/156 Pages) RENESAS

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ZAMC4100 Datasheet

January 26, 2016

HBxCSHEN

HBxCSLEN

HByLEN

HBxOSF

Description

Invalid.

In the case of a load connected between two half-bridges (full-bridge configuration), “x” corresponds to one of the half-bridges (x = 1 to 4) and “y”

corresponds to the other half-bridge (y = 1 to 4). In the case of a load connected between the output of the driver and one of the supply rails, the column

“HByLEN” is not applicable. See Table 3.13 for more information about the HByLEN bits.

Important: The result of the diagnostic procedure is correct only if the drivers involved are switched-off during the diagnostic procedure and are turned

on only when explicitly required according to this table.

The diagnostic procedure for full-bridge configuration includes enabling one of the low-side drivers, which makes a complete diagnostic of the load

possible.

3.9.

High-Side Drivers

Within the SBC, there are 4 high-side drivers for HS1 to HS4. Figure 3.14 shows the block diagram for the each

driver. It is essentially the same as the half-bridge but without the low-side MOSFET.

Figure 3.14 Structure of High-Side Drivers

VDDE

Driver H

Charge

Pump

HSxEN

HSx pin

VSS

HSxCSEN

OCH

Detect

HSxOCIF

Limit

20µs Counter

Integrator

Open/Short

Detect

HSxOSF

RLOAD

VSS

OVT Reset

HSx

PWMEN

From PWM

Block

CPVEIF

OVIF

UVIF

OVTIF

Features of High-Side Drivers:

•

Separate enable bit for each driver.

•

Separate PWM enable bit for each driver.

•

Each NMOS has over-current detection and protection circuitry. The over-current event automatically

disables the driver.

•

If an over-voltage or under-voltage condition is detected at VDDE pin the drivers are automatically disabled.

•

Each driver has diagnostic circuitry for detecting an open or short in the output load.

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