33911 datasheet(28/45 Pages) FREESCALE

28 / 45 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33911

FUNCTIONAL DEVICE OPERATIONS

OPERATIONAL MODES

Figure 17. High Side Driver HS1

Open Load Detection

The high side driver signals an open-load condition if the

current through the high side is below the open-load current

threshold.

The open-load condition is indicated with the HS1OP bits

in the High Side Status Register (HSSR).

Current Limitation

The high side driver has an output current limitation. In

combination with the over-temperature shutdown, the high

side driver is protected against over-current and short-circuit

failures.

When the driver operates in the current limitation area, it is

indicated with the bit HS1CL in the HSSR.

Note: If the driver is operating in current limitation mode

excessive power might be dissipated.

Over-temperature Protection (HS Interrupt)

The high side driver is protected against over-temperature.

In case of an over-temperature condition, the high side driver

is shut down and the event is latched in the Interrupt Control

Module. The shutdown is indicated as an HS Interrupt in the

Interrupt Source Register (ISR).

A thermal shutdown of the high side driver is indicated by

setting the HS1OP and HS1CL bits simultaneously.

If the bit HSM is set in the Interrupt Mask Register (IMR)

than an interrupt (IRQ) is generated.

A write to the High Side Control Register (HSCR), when

the over-temperature condition is gone, will re-enable the

high side driver.

High-voltage Shutdown

In case of a high-voltage condition, and if the high-voltage

shutdown is enabled (bit HVSE in the Mode Control Register

(MCR) is set), the high side driver is shut down.

A write to the HSCR, when the high-voltage condition is

gone, will re-enable the high side driver.

Sleep And Stop Mode

The high side driver can be enabled to operate in Sleep

and Stop Mode for cyclic sensing. Also see Table 5,

Operating Modes Overview.

High Side - Driver

charge pump

open load detection

current limitation

overtemperture shutdown (interrupt maskable)

high voltage shutdown (maskable)

Control

on/off

Status

PWMIN

VDD

PWMHS1

HS1

HVSE

HS1OP

HS1CL

MOD1:2

Interrupt

Control

Module

HS1

VS2

VDD

Wakeup

Module

33911 датащи(PDF) 28 Page - Freescale Semiconductor, Inc

33911 датащи(HTML) 28 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

датащи скачать

ссылки URL