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MPZ2012S221A Datasheet(PDF) 10 Page - STMicroelectronics

No. de pieza MPZ2012S221A
Descripción Electrónicos  38 V, 10 W synchronous iso-buck converter for isolated applications
PDF  56 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

MPZ2012S221A Datasheet(HTML) 10 Page - STMicroelectronics

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Figure 5. Block diagram
VIN
SW
FB
PGND
Power HS
NMOS
Power LS
NMOS
Sense HS
NMOS
High side driver
Error Amplifier
O.V.P. COMP
E.A. ref
FB
O.V.P. Threshold
Sense LS
NMOS
Low side driver
Valley O.C.P. COMP
Zero cross COMP
Current sensing
Current sensing
Z.C. Threshold
O.C.P. Valley threshold
+
Slope compensation
PWM COMP
PWM management
FSW
reading circuit
Internal
Oscillator
FSW
PGOOD
PGOOD COMP
PGOOD Th
FB
EN/CLKIN(*)
External
synchronization
Wake UP Threshold
Wake UP COMP
BOOT
LDOs
VINLDO
VCC
Soft start
VBIAS
Boot driver
Compensation
network
E.P.,
AGND
Skip COMP
Skip. Threshold
Ineg. Threshol.d
Negative curr. COMP
Thermal
protection
EN Threshold
EN COMP
5.1.1
Enable
The EN pin is a digital input that turns the device on or off.
In order to maximize both the EN threshold accuracy and the current consumption, the device implements two
different thresholds:
1.
The Wake-up threshold, VWAKE_UP = 0.5 V (see Section 4 Electrical characteristics).
2.
The Start-up threshold, VEN = 1.2 V (see Section 4 Electrical characteristics.) The following image shows
the device behavior.
L6983I
Primary side
DS14040 - Rev 1
page 10/56



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