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TPS51221 Datasheet(PDF) 2 Page - Texas Instruments

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Part # TPS51221
Description  Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
PDF  36 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS51221 Datasheet(HTML) 2 Page - Texas Instruments

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FUNCTIONAL BLOCK DIAGRAM
XCON
VBST1
DRVH1
SW1
DRVL1
GND
VREG5
VREG5
GND
Control
Logic
PGOOD1
GND
Delay
+
+
+
+
1V+5%/10%
1V-5%/10%
1V-30%
1V+15%
+
PWM
Skip
Ramp
Comp
+
+
VFB1
COMP1
EN1
Enable/
Soft-start
1V
+
CSN1
CSP1
TRIP
Discharge
Control
GND
100mV
+
V5SW
4.7V/4.5V
GND
VREG5
+
VREF2
GND
GND
1.25V
GND
1.25V
GND
+
VREG3
+
4.7V/4.5V
VIN
EN
+
4.2V/3.8V
150/140
Deg-C
V5OK
THOK
Ready
+
SKIPSEL1
IMON1
(CH1only)
OSC
RF
CLK1
CLK2
Fault1
SDN1
UVP
OVP
Fault2
SDN2
Ready
GND
Channel-1Switchershown
+
VREF2
CLK1
VREF2
+
OCP
Ramp
Comp
+
N-OCP
100mV
OOA
Ctrl
+
VFB-AMP
CS-AMP
Amp.
Filter
TPS51221
SLVS786 – NOVEMBER 2007
2
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS51221



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