CS51221EDR16 ON Semiconductor, CS51221EDR16 Datasheet - Page 7

• Manufacturer Part Number: CS51221EDR16
• Description: IC CTRLR PWM FFVOLT MODE 16SOIC
• Manufacturer: ON Semiconductor

Specifications of CS51221EDR16

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 90%
• Voltage - Supply: 4.7 V ~ 15 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: Yes
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (3.9mm Width)
• Frequency-max: 1MHz
• Topology: Buck, Flyback, Forward
• Output Voltage: - 0.3 V to + 15 V
• Output Current: 1000 mA
• Switching Frequency: 1000 KHz
• Duty Cycle (max): 90 %
• Fall Time: 25 ns
• Mounting Style: SMD/SMT
• Rise Time: 60 ns
• Synchronous Pin: Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: CS51221EDR16OSTR

I
COMP
SYNC
SENSE
R
V
I
T
V
SET
CC
C
FF
FB
T
(1.263 V)
V
BG
2.0 V to 1.0 V Trip Points
+
−
DISABLE
+
−
EAMP
UV Lockout
Start/Stop
+
−
3.0 V
UVL
150 ns
Blank
Soft−Start Clamp
ENABLE
−
+
FF Discharge
SS to 1.8 V Max
OSC
Max Duty Cycle
(Sat Sense)
G3
V
+
−
REF
I
+
−
LIM
= 3.3 V
Figure 2. Block Diagram
http://onsemi.com
3.1 V
(Sat Sense)
CS51221
Max SS
7
Det
3.3 V
+
−
−
+
Comp
PWM
−
+
G2
3.0 V
V
REF
S
R
OK
OV Monitor
G4
Q
Q
Shutdown
Thermal
UV Monitor
2.0 mA (maximum load current)
Discharge
Latching
+
−
G1
V
−
+
O
2.0 V
50 mA
Off
Low Sat
Gate Driver
13.5 V
5.0 mA
ON
1.0 V
V
REF
V
V
GATE
PGND
LGND
SS
OV
UV
REF
C