NCS29001
http://onsemi.com
7
APPLICATION CONDITIONS
Symbol Parameter Condition Min Typ Max Unit
VIN
IC
VIN pin voltage 8.5 12 18 V
VIN
Inductor
Inductor input voltage 8.5 80
V
OUT
Output voltage range V
OUT
/VIN
Inductor
Max = 5
VIN
Inductor
= 8.5 to 24 V | V
OUT
= 50 to 80 V
VIN
Inductor
= 24 to 50 V | V
OUT
= 80 to 130 V
VIN
Inductor
= 50 to 80 V | V
OUT
= 130 to 240 V
50 240 V
h
Peak efficiency VIN
IC
= 12 V, V
OUT
= 130 V, I
OUT
= 200 mA
VIN
IC
= 12 V, V
OUT
= 240 V, I
OUT
= 200 mA
95
95
%
Dς
ΟΥΤ
Output Voltage Accuracy including voltage ripple, from −40°C to 85°C,
VIN
IC
= 8.5 V to 18 V
−2 2 %
POWER UP SEQUENCE
Figure 4. Soft Start Power Up from Standby
Standby
VIN
PWMin
PWMout
Vcomp
UVLO
GATE
For the device to begin the soft start sequence the VIN pin voltage needs to be above the UVLO threshold and the OVP pin
voltage needs to be above the V
SCP
threshold. From standby mode soft start will begin when STBY pin goes low and PWMin
pin goes high and lasts for a fixed number of clock cycles. This ensures that smooth start up if the device is powered on from
standby with a PWM input.
