CS5155HGD16 View Datasheet(PDF) - Cherry semiconductor
Part Name
Description
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CS5155HGD16 Datasheet PDF : 14 Pages
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PACKAGE PIN #
16L SO Narrow
7
8
9
10
11
12
13
14
15
16
Package Pin Description: continued
PIN SYMBOL
FUNCTION
COFF
VFFB
VCC2
VGATE(H)
PGnd
VGATE(L)
VCC1
LGnd
COMP
VFB
A capacitor from this pin to ground sets the time duration for the on
board one shot, which is used for the constant off time architecture.
Fast feedback connection to the PWM comparator. This pin is connect-
ed to the regulator output. The inner feedback loop terminates on time.
Boosted power for the high side gate driver.
High FET driver pin capable of 1.5A peak switching current. Internal
circuit prevents VGATE(H) and VGATE(L) from being in high state simul-
taneously.
High current ground for the IC. The MOSFET drivers are referenced to
this pin. Input capacitor ground and the source of lower FET should be
tied to this pin.
Low FET driver pin capable of 1.5A peak switching current.
Input power for the IC and low side gate driver.
Signal ground for the IC. All control circuits are referenced to this pin.
Error amplifier compensation pin. A capacitor to ground should be
provided externally to compensate the amplifier.
Error amplifier DC feedback input. This is the master voltage feedback
which sets the output voltage. This pin can be connected directly to the
output or a remote sense trace.
Block Diagram
VCC1
SS
VID0
VID1
VID2
VID3
VID4
VFB
COMP
VFFB
LGnd
VCC1 Monitor
Comparator
-
+
3.90V
3.85V
5V
60µA
2µA
5 BIT
DAC
Error
+ Amplifier
-
Slow Feedback
PWM
Comparator
-
+
Fast Feedback
-
+
VFFB Low
1V
Comparator
PWM
COMP
2.5V
SS Low
- Comparator
+
0.7V
SS High
+ Comparator
-
Maximum
On-Time
Timeout
Normal
Off-Time
Timeout
Extended
Off-Time
Timeout
FAULT
R
Q
S
Q FAULT
FAULT
Latch
VCC2
VGATE(H)
PGnd
VCC1
VGATE(L)
PGnd
R
Q
S
Q
PWM
Latch
Off-Time
Timeout
GATE(H) = ON
GATE(H) = OFF
COFF
One Shot
R
S
Q
COFF
Time Out
Timer
(30µs)
Edge Triggered
5
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