YDA136 Datasheet, PDF (20/32 Pages) YAMAHA CORPORATION – D- 60 STEREO 60W-100W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER

YDA136
●IBB Terminal Setting
In the PWM circuit, the IBB terminal is used and VBB power supply voltage is
feedbacked. Simultaneously, under voltage detection of VBB power supply voltage is
In the case of VBB=40V Example
of a resistance setting
VBB
performed by monitoring the voltage of the terminal.
After making 1.5V by dividing VBB voltage with resistors, an then be sure to input it
910kΩ
into IBB terminal.
IBB
Set for the voltage of the IBB terminal not to become 1.6V or more even if the VBB
voltage moves.
36kΩ
●PowerMOSFET Drive Function
Since it is BTL connection digital amplifier, external connection of two sets per channel of Pch and Nch PowerMOSFET is
made.
A High-Side driver output is connected to Pch PowerMOSFET, and a Low-Side driver output is connected to Nch
PowerMOSFET as shown below.
Non-inverted side Pch PowerMOSFET ：Be sure to connect to OPPLU and OPPLD (OPPRU,OPPRD).
(High-Side Driver Output)
Non-inverted side Nch PowerMOSFET ：Be sure to connect to ONPLU and ONPLD (ONPRU,ONPRD).
(Low-Side Driver Output)
Inverted side Pch PowerMOSFET ：Be sure to connect to OPMLU and OPMLD (OPMRU,OPMRD).
(High-Side Driver Output)
Inverted side Nch PowerMOSFET ：Be sure to connect to ONMLU and ONMLD (ONMRU,ONMRD)
(Low-Side Driver Output)
There are two output terminals to one PowerMOSFET, and they mean the pull-up output and the pull-down output,
respectively.
By connecting gate resistor (RG) between each driver output and PowerMOSFET, slew-rate of both pull-up and pull-down
side separately.
In the example of peripheral circuit connection, resistor (RG) of 20Ω is connected with the pull-down side output of Pch
PowerMOSFET and the pull-up side output of Nch PowerMOSFET.
VBB VBB
High-Side Driver
OPPLU
OPPLD
OPMLU
OPMLD
OPPRU
OPPRD
OPMRU
OPMRD
Low-Side Driver
Analog Circuit
ONPLU
ONPLD
ONMLU
ONMLD
ONPRU
ONPRD
ONMRU
ONMRD _RG
YDA136
P
P
P
P
N
N
N
N
VSS VSS
In addition, total amount of electric charges (Qg) of gates in PowerMOSFET, which is used by connecting to YDA136,
should be 20nC or less (Vgs=5V).
20