RT8205A RICHTEK [Richtek Technology Corporation], RT8205A Datasheet - Page 6

• Manufacturer Part Number: RT8205A
• Description: High Efficiency, Main Power Supply Controllers for Notebook Computers
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8205A/B/C
Function Block Diagram
Copyright
www.richtek.com
6
©
2012 Richtek Technology Corporation. All rights reserved.
PGOOD
VOUT
REF
FB
ENTRIP1
UGATE1
PHASE1
LGATE1
BOOT1
VOUT1
VREG5
PGND
FB1
VIN
EN
1.1 x V
0.7 x V
0.9 x V
-
+
TONSEL
+
-
REF
REF
REF
Compute
On-Time
VREG5
VIN
+
-
-
+
-
+
VREG5
SW Threshold
Over-Voltage
Under-Voltage
Clear Fault Latch
- Comp
+
PWM Controller (One Side)
Power-On
Sequence
Function Block Diagram
T
PWM Buck
Controller
ON
SMPS1
Shutdown
Thermal
1-Shot
TRIG
Latch
Fault
Blanking
Q
Time
TONSEL SKIPSEL
R
Detector
25kHz
PWM Buck
Controller
REF
Time
SMPS2
SS
REF
Detector
TRIG
Zero
is a registered trademark of Richtek Technology Corporation.
SW Threshold
SKIPSEL
Q
1-Shot
T
VREG3
OFF
+
-
+
-
-
+
Current
Limit
VREG5
+
-
VREG5
BOOT2
UGATE2
PHASE2
LGATE2
VOUT2
FB2
ENTRIP2
PGOOD
GND
VREG3
DS8205A/B/C-06 July 2012
UGATE
LGATE
ENTRIP
PHASE