RT9986 RICHTEK [Richtek Technology Corporation], RT9986 Datasheet - Page 22

• Manufacturer Part Number: RT9986
• Description: 7-CH DC/DC Converter for DSC
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9986
www.richtek.com
22
BAT
VDDM
CH1
Step-Up
CH2
Step-Up
CH2
Step-Down
UVLO
OVP
UVLO
Current
Limit
PVDD1
OVP
PVDD1
UVP
FB1 UVP
FB1 Over
Load (OL)
Current
Limit
PVDD2
OVP
PVDD2
UVP
FB2 UVP
FB2 Over
Load
Current
Limit
FB2 UVP
FB2 Over
Load
Protection
type
BAT < 1.3V
VDDM > 6V
VDDM < 2.4V
N-MOSFET
Current > 3A
PVDD1 > 6V
PVDD1 < (BAT
or PVDD1 < 1.28V after
soft-start end.
FB1
soft-start end.
FB1
N-MOSFET Current >
3A
PVDD2 > 6V
PVDD2 < (BAT
or PVDD2 < 1.28V after
soft-start end.
FB2
soft-start end.
FB2
P-MOSFET
Current > 1.6A
FB2
soft-start end.
FB2 < 0.7V
Threshold (typical)
Refer to Electrical
0.4V after
0.7V
0.4V after
0.7V
0.4V after
spec
0.8V)
0.8V)
Table 2. Protection Items
IC Shutdown.
Automatic reset at VDDM <
5.75V
IC Shutdown.
N-MOSFET off, P-MOSFET off.
Automatic reset at next clock
cycle.
N-MOSFET off, P-MOSFET off. No-delay
N-MOSFET off, P-MOSFET off. 100ms
N-MOSFET off, P-MOSFET off. No-delay
IC Shutdown when OL occur
each cycle until 100ms.
N-MOSFET off, P-MOSFET off.
Automatic reset at next clock
cycle.
N-MOSFET off, P-MOSFET off. No-delay
N-MOSFET off, P-MOSFET off. 100ms
N-MOSFET off, P-MOSFET off. No-delay
IC Shutdown when OL occur
each cycle until 100ms.
N-MOSFET off, P-MOSFET off.
Automatic reset at next clock
cycle.
N-MOSFET off, P-MOSFET off. No-delay
IC Shutdown when OL occur
each cycle until 100ms.
Protection methods
No-delay
100ms
No-delay
100ms
100ms
100ms
100ms
100ms
100ms
Delay time
Shutdown
IC
DS9986-00 May 2011
VDDM power reset
or all enable pins
set to low
or all enable pins
set to low
pins set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
or all enable pins
set to low
VDDM power reset
VDDM power
reset or all enable
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
VDDM power reset
Reset method
To be continued