AS3693B datasheet(14/33 Pages) AMSCO

14 / 33 page

AS3693B

austriami crosyst ems

www.austriamicrosystems.com

Revision 1.21 / 2011-09-30

13 - 32

Table 11 –CURREG_CONTROL

Addr: 0dh

Curreg Control

Controls Rise, Fall times and References of the Curreg.

Bit

Bit Name

Default

Access

Description

1:0

Analog Ref Select

R/W

Voltage reference for the current regulators can be

chosen with these options.

00 = 250mV reference

01 = external reference

10 = DAC reference

11 = do not use

3:2

SLEW_RATE_CONT

ROL

R/W

SLEW – RATE – Control. Adjusts the rise and fall time of

the current switching

00 = typ. 9us

01 = typ. 6us

10 = typ. 3us

11 = typ. 1us

5:4

PWM_LOW_LEVEL

R/W

Note: Test bits for internal use only

boost mode

R/W

Gives +30% current.

only available in internal reference mode.

0,5% VREF 250mV

8Bit DAC

0...500mV

External Reference

AS3693B

Reference Sources

Analog Ref Select

PWM

Curreg

3-16

Table 12 – Ref_DAC_Voltage

Addr: 0eh

Ref_DAC_Voltage

The Regulation Voltage can be chosen in this register

Bit

Bit Name

Default

Access

Description

7…0

Ref_DAC_Voltage

R/W

Reference voltage for current regulators. (Note: If Analog

Ref Select = 10, the regulation voltage can be adjusted

here.

00000000 = 0mV

00000001

…

01111111 = 250 mV

11111111= 500mV

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