POWER I.C.. VB409 Datasheet

VB409 I.C.. Datasheet pdf. Equivalent

VB409 Datasheet
Recommendation VB409 Datasheet
Part VB409
Description HIGH VOLTAGE REGULATOR POWER I.C.
Feature VB409; ® VB409 / VB409SP HIGH VOLTAGE REGULATOR POWER I.C. PRELIMINARY DATA TYPE VB409 VB409SP ICL(in) 0.
Manufacture STMicroelectronics
Datasheet
Download VB409 Datasheet




STMicroelectronics VB409
VB409
® / VB409SP
TYPE
VB409
VB409SP
HIGH VOLTAGE REGULATOR POWER I.C.
ICL(in)
0.8 A
ICL(out)
70 mA
VOUT
5V ± 5%
PRELIMINARY DATA
s NO HIGH VOLTAGE EXTERNAL CAPACITOR
s 5 V DC REGULATED OUTPUT VOLTAGE
s OUTPUT CURRENT LIMITED TO 70 mA
s THERMAL SHUT-DOWN PROTECTION
s INPUT OVERCURRENT PROTECTION
s POWER DISSIPATION INTERNALLY LIMITED
DESCRIPTION
The VB409 VB409SP are fully protected positive
voltage regulator designed in STMicroelectronics
High Voltage VIPowertechnology. The devices
can be connected directly to the rectified mains
(110V/230V). The devices are well suited for
applications powered from the AC mains and
requiring a 5V DC regulated output voltage
without galvanic insulation. VB409, VB409SP
provides up to 70 mA output current (internally
limited) at 5V. The included over current and
BLOCK DIAGRAM
10
1
PENTAWATT HV(022Y) PowerSO-10
ORDER CODES:
PENTAWATT HV(022Y) VB409
PowerSO-10
VB409SP
thermal shutdown provide protection for the
device.
INPUT
Cap
Input current
limiter
Threshold
Vref2
Thermal
protection
Vref1
Output current
limiter
GND
Vref3
April 2000
OUTPUT
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STMicroelectronics VB409
VB409 / VB409SP
ABSOLUTE MAXIMUM RATING
Symbol
VIN,OUT
IOUT
PTOT
IIN
Tj
TSTG
Parameter
Input to output voltage
Output current
Power dissipation at TC=25°C
Input current
Junction operating temperature
Storage temperature
THERMAL DATA
Symbol
Parameter
Rthj-amb
Rthj-case
Thermal resistance junction-ambient
Thermal resistance junction-case
CONNECTION DIAGRAM (TOP VIEW)
Value
- 0.2 to 420
Internally limited
Internally limited
Internally limited
- 40 to 125
- 55 to 150
Unit
V
mA
W
mA
°C
°C
Value
PENTAWATT POWERSO-10
(MAX)
60
50
(MAX)
1.1
Unit
Unit
°C/W
°C/W
CAPACITOR
THRESHOLD
N.C.
GROUND
OUTPUT
65
74
83
92
10 1
11
INPUT
PO WE RSO -10
N.C.
N.C.
N.C.
N.C.
N.C.
5
4
3
2
1
PC10000
OUTPUT
GROUND
INPUT
THRESHOLD
CAPACITOR
PENTAWATT HV(022Y)
ELECTRICAL CHARACTERISTICS (VIN=230Vr.m.s.; 50Hz; C1=100µF; V1=50V (See Fig. 2); IOUT =25mA;
VOUT=5V; -25ºC<Tj<125ºC) (unless otherwise specified)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
VIN(ac)
BVIN-GND
Input voltage a.c.
Breakdown voltage
input-ground in off state
15 230 Vr.m.s.
650 V
fIN Input frequency
0 1 kHz
VOUT
Output voltage
4.75 5 5.25 V
VOUT/Vcap Cap regulation
Vcap=8 to 12V; VIN=0V; Tj=25°C
7 mV/V
VOUT/IOUT Load regulation
IOUT=1 to 40mA; Vcap=10V; Tj=25°C
500 µV/mA
ICL(out)
Output current limit
Tj=25°C
70 90 mA
Tjsh
Junction temperature
shutdown limit
140 150
°C
Tjsh
Junction temperature
shutdown hysteresis
35 °C
Id
Vd
ICL(in)
Vcap/T
Quiescent current
Dropout voltage
(Vcap to VOUT)
Input clamp current
Drift of capacitor pin
voltage in temperature
Tj=25°C; IOUT=0A
Tj=25°C
0.8
-15
2 mA
3V
2A
mV/°C
Vcap(max)
Max clamped voltage
on cap pin
12
14.5
V
Vref1
Ith
Reference threshold
Voltage
Current on threshold pin
10 10.5 11
100
V
µA
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STMicroelectronics VB409
VB409 / VB409SP
OPERATION DESCRIPTION
The VB409, VB409SP contain two separate
stages, as shown in the block diagram. The first
stage is a preregulator that translates the high
rectified mains voltage to a low voltage and
charges an external electrolytic capacitor. The
second stage is a simple 5V regulator. The typical
operating waveforms are shown in Figure 2. The
device may be driven by a half wave (110 or 230
Vr.m.s.) or by a full wave using a bridge rectifier.
Current flow through the preregulator stage is
provided by the trilinton only during a conduction
angle, at both the start and the end of each half
cycle. This angle is set by adjusting the external
resistor divider (R1 and R2), in order to set the
time t1 at which voltage at the threshold pin
reaches the internal threshold Vref1 (see Figure
2a). When the threshold pin voltage gets over
Vref1, the series trilinton is switched off and
remains off until voltage at the threshold pin again
drops below the internal threshold. Using this
technique, energy is drawn from the AC mains
only during the low voltage portions of each
positive half cycle, thus reducing the dissipation in
the first stage. During the conduction angle,
current provided by the trilinton is used to supply
the load and to charge the capacitor C1. In such a
way, when the trilinton switches off, the load
receives the required current by the capacitor
discharge. For this reason it is important to set
properly the conduction angle: during this period
C1 has to reach a sufficient charge to guarantee
that, at the end of discharging, the voltage drop
between the capacitor and the output pin is over
2V. Assuming that conduction angle has been set,
two different possibilities can occur:
1) C1 value is such to reach Vcap(max) within the
conduction angle. As the comparator also
senses C1 voltage, when Vcap gets over Vref1,
the trilinton would switch off. But doing this, the
capacitor would discharge through the load so
reducing its voltage. As soon as Vcap drops
below Vref1, the trilinton switches on. As
consequence the trilinton reaches a stable
condition limiting the current to a value
sufficient to supply the load and hold the
capacitor voltage just below Vcap(max) (see
figures 2b and 2c).
2) C1 value is such to reach Vcap(max) outside the
conduction angle. In this case the trilinton
doesn’t reduce the current, but hold it to a
constant value (ICL(in)) during the whole
conduction angle (see figures 3a and 3b).
As there are two conduction angles for each half
cycle, the capacitor is recharged twice during each
period. In such a way the capacitor voltage has a
small ripple and, consequently, it needs a small
current to regenerate its charge. The device has
integrated current limit and thermal shutdown
protections. The thermal shutdown turns the low
voltage stage off, if the die temperature exceeds a
predetermined value. Hysteresis in the thermal
sense circuit holds the device off until the die
temperature cools down.
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