XC9141 Datasheet, PDF (2/30 Pages) Torex Semiconductor – Load Disconnection Function, 0.8A Step-up DC/DC Converters

XC9141/XC9142 Series
˙BLOCK DIAGRAM
˔XC9141A/XC9142A type


Lx


CFB RFB1
Ph ase
Com pe nsa tion
Error Amp.
PWM
FB
comparator
RFB2
Current sense
PWM/PFM
Controller Logic
Vref with
Soft Start

RAMP Wave
Ge ne ra tor
OS C
Buffer
Drive r
Load disconnect
Con troller
VOUT
CL
Dischar g e
VOUT
GND


CE








CE Controller
Logic

VOUT
VDD
VDD MAX
BA T
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
* XC9141 series chooses only PWM control.



˔XC9141B/XC9142B type


Lx
CFB RFB1
Ph ase
Com pe nsa tion
Error Amp.
PWM
FB
comparator
Current sense
Load disconnect
Con tr oller
VOUT
VOUT
RFB2
PWM/PFM
Controller Logic
Buffer
Drive r
GND




CE




Vref with
Soft Start

CE Controller
Logic

RAMP Wave
Ge ne ra tor
OS C
VOUT
Bypass SW
VDD
VDD MAX
BA T
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
* XC9141 series chooses only PWM control.



˔XC9142C type


CFB RFB1
Ph ase
Com pe nsa tion
Error Amp.
PWM
FB
comparator
RFB2
Current sense
PWM/PFM
Controller Logic


CE






Vref with
Soft Start

CE Controller
Logic

RAMP Wave
Ge ne ra tor
OS C
Lx
Buffer
Drive r
Load disconnect
Con tr oller
VOUT
VOUT
VDD
VDD MAX
VOUT
GND
BA T
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.


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