NCP1251ASN65T1G ON Semiconductor, NCP1251ASN65T1G Datasheet - Page 3

• Manufacturer Part Number: NCP1251ASN65T1G
• Description: IC PWM CTLR OCP LATCH OVP 6TSOP
• Manufacturer: ON Semiconductor

Specifications of NCP1251ASN65T1G

• Output Isolation: Isolated
• Frequency Range: 61kHz ~ 71kHz
• Voltage - Input: 9.4 V ~ 28 V
• Voltage - Output: 12V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 6-TSOP (0.063", 1.60mm Width)
• Number Of Outputs: 1
• Duty Cycle (max): 84 %
• Output Current: 300 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 65 KHz
• Operating Supply Voltage: 28 V
• Supply Current: 2.1 mA
• Maximum Operating Temperature: + 125 C
• Fall Time: 30 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 40 ns
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

OP P
FB
CS
RFB
Vlatch
vdd
VDD
Vskip
/ 4.2
Vfold
OVP
gone?
Frequency
modulation
LEB
Frequency
foldback
Figure 2. Internal Circuit Architecture
Up
RST
4
R
S
600 ns time
constant
counter
Q
Q
250 mV
peak current
freeze
Rramp
Power on
reset
http://onsemi.com
VOPP
vd d
The soft-start is activated during:
- the startup sequence
- the auto-recovery burst mode
1 ms
blanking
3
65/
100 kHz
clock
power
on reset
+
IpFlag
V FB < 1.05 V ? s e t p o in t = 250 mV
Vcc and logic
management
Vlimit
Vlimit + VOPP
S
R
hiccup
20 ms time
constant
Q
Q
4 ms
SS
IpFlag
UVLO
VOVP
Clamp
GND
Drv
Vcc