ASL4501SHN datasheet(7/43 Pages) NXP

7 / 43 page

ASL4501SHN

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 10 January 2018

7 of 43

NXP Semiconductors

ASL4501SHN

Four-phase boost converter

8.1 Operating modes

[1]

Setting the bit cfg_dn to logic 0 also grants write access to the configuration registers.

8.1.1 Off mode

The ASL4501SHN switches to off mode, if the input voltage drops below the power-on

detection threshold voltage (Vth(det)pon) or the EN pin is LOW.

In off mode, the SPI and all outputs are turned off.

8.1.2 Configuration mode

The ASL4501SHN switches immediately from off mode to configuration mode, when the

input voltage rises above the power-on detection threshold voltage (Vth(det)pon) and pin EN

is HIGH.

The configuration registers can be set when the ASL4501SHN is in the configuration

mode.

8.1.3 Operation mode

The ASL4501SHN switches from configuration mode to operation mode, as soon as the

configuration done bit is set. Once the bit is set, the configuration registers are locked and

cannot be changed.

In operation mode, the output is available as configured via the SPI. Setting bits Vout1en

or Vout2en, initiates the gate driver. Once the gate driver is in regulation, signaled by bit

VGG_ok, the respective programmed target voltages are turned on. When the converters

are on, the battery monitoring functionality is available.

Table 3.

Operating modes

Mode

Control

registers

Configuration

registers

Diagnostic

registers

VGG

Vout1

Vout2

Remarks

Off

n.a.

off

device is off, no communication

possible

Configuration

read/write read/write

read

off

VGG is off if no outputs were previously

enabled

read

according

to register

off

VGG is on as soon as one of the

outputs has been enabled

Operation

read/write read

read

locked

according

to register

configuration registers are locked

Fail silent

read/write read

read[1]

off

communication possible, but all outputs

off; restart via EN possible

Calibration

read/write read/write

read

must be

turned on

must be

turned off

for successful calibration, the device

has to be correctly configured, VGG has

to be on and the outputs off; it is

achieved by putting cfg_dn HIGH and

LOW after the configuration of the

device

ASL4501SHN Datasheet(PDF) 7 Page - NXP Semiconductors

ASL4501SHN Datasheet(HTML) 7 Page - NXP Semiconductors

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

Datasheet Download

Link URL