NCP1601A, NCP1601B
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS (For typical values T
J
=25C. For min/max values, T
J
=--40C to +125C, V
CC
=15V,
V
control
= 100 nF, Ramp = 100 pF, Osc = 220 pF unless otherwise specified)
Characteristic
Pin Sy mbol Min Typ Max Unit
OSCILLATOR
Oscillator Frequency (Osc = 220 pF to GND)
5 f
osc
52 58 64 kHz
Internal Capacitance of the Oscillator Pin 5 C
osc(int)
-- 36 -- pF
Maximum Oscillator Switching Frequency 5 f
osc(max)
-- 405 -- kHz
Oscillator Discharge Current (Osc = 5.5 V) 5 I
odch
40 49 60 mA
Oscillator Charge Current (Osc = 3 V) 5 I
och
40 45 60 mA
Comparator Lower Threshold (Osc = 220 pF to GND) (Note 3) 5 V
sync(L)
3.0 3.5 4.0 V
Comparator Upper Threshold (Osc = 220 pF to GND) 5 V
sync(H)
4.5 5 5.5 V
Synchronization Pulse Width for Detection 5 t
sync(min)
500 -- -- ns
Synchronization Propagation Delay 5 t
sync(d)
-- 371 -- ns
GATE DRIVE
Gate Drive Resistor
Output High and Draw 100 mA out of Drv Pin (I
source
= 100 mA)
Output Low and Insert 100 mA into Drv Pin (I
sink
= 100 mA)
7
R
OH
R
OL
5
2
11.6
7.2
20
18
Ω
Ω
GateDriveRiseTimefrom1.5Vto13.5V(Drv=1nFtoGND) 7 t
r
-- 53 -- ns
Gate Drive Fall Time from 13.5 V to 1.5 V (Drv = 1 nF to GND) 7 t
f
-- 32 -- ns
FEEDBACK / OVERVOLTAGE PROTECTION / UNDERVOLTAGE PROTECTION
Reference Current
1 I
ref
192 203 208 mA
Regulation Block Ratio 1 I
regL
/I
ref
95 96 97 %
V
control
Pin Internal Resistor 2 R
control
-- 300 -- kΩ
Maximum Control V oltage (I
FB
= 100 mA) 2 V
control(max)
0.95 1.05 1.15 V
Feedback Pin Voltage (I
FB
= 100 mA) 1 V
FB1
-- 3 -- V
Overvoltage Protection Current Ratio 1 I
OVP
/I
ref
104 107 -- %
Overvoltage Protection Current 1 I
OVP
-- 217 225 mA
Undervoltage Protection Current Ratio 1 I
UVP
/I
ref
4 8 15 %
CURRENT SENSE
Current Sense Pin Offset Voltage (I
S
= 100 mA) 4 V
S
-- 4 -- mV
Overcurrent Protection Level 4 I
S(OCP)
190 203 210 mA
Current Sense Pin Offset Voltage at Overcurrent Level 4 V
S(OCP)
0 3.2 20 mV
Zero Current Detection Level 4 I
S(ZCD)
9 14 19 mA
Current Sense Pin Offset Voltage at Zero Current Level 4 V
S(ZCD)
0 7.5 20 mV
Zero Current Sense Resistor (R
S(ZCD)
=V
S(ZCD)
/I
S(ZCD)
) 4 R
S(ZCD)
-- 0.536 1 kΩ
RAMP
Charging Current (Ramp = 0 V)
3 I
ch
95 100 105 mA
Maximum Power Resistance (R
power
=V
control(max)
/I
ch
) 3 R
power
9.5 10.5 11.5 k Ω
Internal Clamping of Voltage V
ton
-- V
ton(max)
-- 3.9 -- V
Internal Capacitance of the Ramp Pin 3 C
ramp(int)
-- 20 -- pF
Ramp Pin Sink Resistance (Osc = 0 V, Ramp = 1 mA sourcing) 3 R
ramp
-- 71.5 -- Ω
THERMAL SHUTDOWN
Thermal Shutdown Threshold (Note 4)
-- T
SD
140 -- -- C
Thermal Shutdown Hysteresis -- T
H
-- 45 -- C
2. Comparator lower threshold is also the synchronization threshold.
3. Guaranteed by design.
