Datasheet

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FUNCTIONAL BLOCK DIAGRAM
Current
Control
Soft Start
1.2 MHz
Oscillator
VFB
1.154V
Comparator
GM Amplifier
Sawtooth
Generator
VFB
1.154
SUP
SUP
DRVP
FBP
Vref
1.213V
Vref
1.213V
Bias Vref=1.213V
Logic Control Block
Shutdown Latch Timer
Thermal Shutdown
DLY1
CTRL
ADJ
REF
FBN
DRVN
COMP
FB
VIN
SW SW
FDLY
VCOM
GND
Q1
Q3
Q4
SUP
Reference
Output
Negative
Charge Pump
Positive
Charge Pump
Main boost
converter
Vref
1.213V
Current
Control
Softstart
SUP
(Vout)
GM Amplifier
Low Gain
Current Limit
and
Soft Start
Control
Logic
Gate Drive circuit
Q2
SUP
I
DLY1
Vin
Vref
DL1
Delay Between
Vs and VGL
Gate Voltage
Control Circuit
IN
Q5
I
ADJ
Q6
Vref
1.213V
UVLO
CPI
Q7
Control
CTRL,EN,FBP=high
Q11=Q13=on, Q12=off
CTRL=low
Q11=Q13off, Q12=on
I
DRVP
I
DRVN
I
DLY2
Vin
Vref
Delay Between
VGL and VGH
DLY2
PGND
PGND
DL2
DL1 DL2
SUP
Soft Start
Q11
Q12
VCOM
Buffer
Disable
Main Boost
Soft Start
Completed
Main Boost
Power Good
GD
VGH
ADJ
Gate Drive
SUP
ADJ
TPS65150
SLVS576 – SEPTEMBER 2005
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