NCP1070_16 Datasheet, PDF (5/30 Pages) ON Semiconductor – High-Voltage Switcher for Low Power Offline SMPS

NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077
ELECTRICAL CHARACTERISTICS
(For all NCP107X products except NCP1072P100BG: For typical values T_J = 25°C, for min/max values T_J = −40°C to +125°C, V_CC = 8 V
unless otherwise noted)
(For NCP1072P100BG: For typical values T_J = 25°C, for min/max values T_J = −55°C (Note 7) to +125°C, V_CC = 8 V unless otherwise noted)
Symbol
Rating
Pin
Min
Typ
Max
Unit
SUPPLY SECTION AND V_CC MANAGEMENT
V_CC(on)
V_CC increasing level at which the switcher starts operation
NCP1070/71/72/75
NCP1076/77
V
1
7.8
8.2
8.6
1
7.7
8.1
8.5
V_CC(min)
V_CC(off)
V_CC(reset)
V_CC(clamp)
V_CC decreasing level at which the HV current source restarts
V_CC decreasing level at which the switcher stops operation (UVLO)
V_CC voltage at which the internal latch is reset (guaranteed by design)
Offset voltage above V_CC(on) at which the internal clamp activates
NCP1070/71
NCP1072/75
NCP1076/77
1
6.5
6.8
7.2
V
1
6.1
6.3
6.6
V
1
4
V
mV
1
110
170
300
1
130
190
300
1
130
190
300
I_CC1
Internal IC consumption, Mosfet switching
NCP1070/71/72/75
NCP1076/77
mA
1
−
0.7
1.0
1
−
1.0
1.3
I_CCskip Internal IC consumption, FB is 0 V (No switching on MOSFET)
1
POWER SWITCH CIRCUIT
360
mA
R_DS(on)
Power Switch Circuit on−state resistance (Id = 50 mA)
NCP1070/71
T_J = 25°C
T_J = 125°C
NCP1072/75
T_J = 25°C
T_J = 125°C
NCP1076/77
T_J = 25°C
T_J = 125°C
BV_DSS
Power Switch Circuit & Startup breakdown voltage
(ID_(off) = 120 mA, T_J = 25°C)
I_DSS(off) Power Switch & Startup breakdown voltage off−state leakage current
T_J = 125°C (Vds = 700 V)
Switching characteristics (R_L=50 W, V_DS set for I_drain = 0.7 x Ilim)
t_on
Turn−on time (90% − 10%)
t_off
Turn−off time (10% − 90%)
INTERNAL START−UP CURRENT SOURCE
5
W
−
22
32
−
38
55
−
11
16
−
19
24
−
4.7
6.9
−
8.7 10.75
5
700
V
mA
5
85
ns
5
20
5
10
I_start1
High−voltage current source, V ₌ V_CC(on) − 200 mV
NCP1070/71/76/77
NCP1072/75
mA
5
5.2
9.2
12.2
5
5
9
12
I_start2 High−voltage current source, V_CC = 0 V
V_CCTH VCC Transient level for Istart1 to Istart2 toggling point
CURRENT COMPARATOR
5
0.5
mA
1
−
2.2
−
V
I_IPK
Maximum internal current setpoint at 50% duty cycle
FB pin open, Tj = 25°C
NCP1070
NCP1071
NCP1072
NCP1075
NCP1076
NCP1077
mA
−
250
−
−
350
−
−
250
−
−
450
−
−
650
−
−
800
−
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
4. The final switch current is: I_IPK(0) / (V_in/L_P + S_a) x V_in/L_P + V_in/L_P x t_prop, with S_a the built−in slope compensation, Vin the input voltage, L_P
the primary inductor in a flyback, and t_prop the propagation delay.
5. NCP1072 130 kHz on demand only.
6. Oscillator frequency is measured with disabled jittering.
7. For coldest temperature, QA sampling at −40°C in production and −55°C specification is Guaranteed by Characterization.
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