S
ERIES
STR-B5050
ADVANCE INFORMATION
(subject to change without notice)
March 10, 1999
Data Sheet
28195
FLUORESCENT-LAMP
INVERTER BALLAST
The Series STR-B5050 is a fully integrated solution for electronic
fluorescent ballasts in commercial, industrial, and consumer applica-
tions. The nine devices in this series are identical except for output
driver ratings (<72 W to 200 W).
Each device includes control circuitry, a high-voltage driver, and
two power MOSFETs in a fully isolated, single in-line power-tab
package. Built-in sequences are provided for pre-heat, strike, normal
operation, dimming, and fault or end-of-life protection. Super-resonant
operation (inductive/lagging power factor) is sustained in all operating
modes. Auto restart, together with the full complement of protection
functions, ensures reliable operation in demanding environments.
V
IN
NC
OUT
1
V
B
NC
SENSE
RESET
ON/OFF
DRIVE V
CC
GND
NC
F
CONT
F
LATCH
F
FL
F
PH
RC
COM
NC
OUT
2
ABSOLUTE MAXIMUM RATINGS
Output Voltage,
V
OUT
. . . . . . .
See Specifications
High-Side Gate Supply Voltage,
V
B
. . . . . . . . . . . . . . . . . . . .
8.5 V
Control Supply Voltage, V
CC
. . . .
36 V
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . .
See Graph
Junction Temperature, T
J
. . .
+150
°
C
Operating Temperature Range,
T
A
. . . . . . . . . . . .
-20
°
C to +125
°
C
Storage Temperature Range,
T
stg
. . . . . . . . . . .
-40
°
C to +150
°
C
I
D
C
S
E
R
L
P
+
+
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Dwg. PK-010
FEATURES
s
600 V BCD Monolithic Control/Half-Bridge Driver
s
3
rd
Generation High-Voltage Power MOSFETs
s
Built-In Sequencing:
Pre-Heat, Strike, Dimming, End-of-Life
s
Auto Restart After Lamp Exchange
s
Avalanche-Rated NMOS
s
Low r
DS(on)
NMOS Outputs
s
Improved Body Diodes
s
ON/OFF and Reset Functions
s
Regulated High-Side Driver
s
Comprehensive Protection:
Fault/End-of-Life or
Sub-Resonant Operation
s
Electrically Isolated Power Tab
s
Machine-Insertable Package
N
E
I
S
T
N
BY
O
C
A
D
E
D
ST
E
S
U
IE
R
R
P
D
O
T
C
U
4
5
B
0
5
CONTROL/LOGIC
-
R
Always order by complete part number:
STR-B5054
.
™
S
ERIES
STR-B5050
FLUORESCENT-LAMP
INVERTER BALLAST
FUNCTIONAL BLOCK DIAGRAM
V
CC
8
START/STOP
SENSE
6
V
REG
V
SENSE
+
–
DRIVE V
CC
8
V
B
4
1
V
IN
OSC
CLOCK PULSE
T
Q
SOFT START
PREHEAT #1
PREHEAT #2
COUNTER
COUNTER
COUNTER
COUNTER
COUNTER
FULL LIGHT
RESET
ON/OFF
7
+
–
V
RESET
RESET
OSC
HIGH-VOLTAGE DRIVER
START UP
3
18
V
CC
OUT
1
OUT
2
+
–
V
ON/OFF
PROTECTION
OSC
STOP
CONTROL
POWER
OSC CONTROL
PRE HEAT
POWER
FULL
SUB-RESONANCE
DETECT
16
COM
11
F
CONT
12
F
LATCH
13
F
FL
14
F
PH
15
RC
9
GND
Dwg. FK-013
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
25
20
R
θJM
= 5.0°C/W
15
ALLOWABLE PACKAGE
POWER DISSIPATION
10
5
R
θJA
= 28°C/W
0
25
50
75
100
TEMPERATURE in
°C
125
150
Dwg. GK-018-1
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1999 Allegro MicroSystems, Inc.
™
S
ERIES
STR-B5050
FLUORESCENT-LAMP
INVERTER BALLAST
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Controller
Operation Start Voltage
V
CC(ON)
Operation Stop Voltage
V
CC(OFF)
Gate Drive Circuit Voltage
V
DRI
Range of Full Lighting Freq.
f
FL
Maximum Output Frequency
∆f
MAX
Range of Preheating Freq.
∆f
PH
Range of Dimming Freq.
∆f
CONT
Range of Lamp Life
∆f
LATCH
Protection Frequency
Preheating Start Freq.
f
SPH
Ignition Frequency
f
IGN
Output Dead Time
t
d
Soft Start Time
t
ss
Filament Preheat Start Time
t
SPH
Filament Preheating Time
t
PH
Ignition Time
t
IGN
Full Lighting Hold Time
t
FL
Deviated Resonant Mode
V
RC
Detec. Voltage
Lamp Life End Detection Volt.
V
SENSE
Reset Signal Input Voltage
V
RESET
ON/OFF Signal Input Volt.
V
ON/OFF
MOSFET Drivers
Drain-Source Breakdown Volt. V
(BR)DSS
Drain-Source ON Resist.
r
DS(on)
Remarks
Min
–
–
–
0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Limits
Typ Max
17
9.0
8.0
50
80
–
–
–
+15
-15
1.2
15
15
1.0
1.0
2.0
±0.1
1.5
2.0
3.5
See Table
See Table
–
–
–
70
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Units
V
V
V
kHz
kHz
kHz
kHz
kHz
%
%
µs
ms
ms
s
s
s
V
V
V
V
V
Ω
At soft-start state
Adjustable by external resistor
Adjustable by external resistor
Adjustable by external resistor
Proportion to preheating frequency
Proportion to preheating frequency
Soft start finish to ignition start
Preheating finish to full lighting
Full lighting at start to dimming
S
ERIES
STR-B5050
FLUORESCENT-LAMP
INVERTER BALLAST
Part Number
Drain-Source
Drain-Source
Output Breakdown Voltage ON Resistance
V
(BR)DSS
, Minimum
r
DS(on)
, Maximum
For 100/120 V AC Input
450 V
450 V
450 V
500 V
500 V
500 V
600 V
600 V
600 V
0.61
Ω
0.95
Ω
1.41
Ω
For 110/120 V AC Input
0.72
Ω
1.12
Ω
1.67
Ω
For 230 V AC Input
1.02
Ω
1.50
Ω
2.45
Ω
Output Power
STR-B5051
STR-B5052
STR-B5053
STR-B5054
STR-B5055
STR-B5056
STR-B5057
STR-B5058
STR-B5059
102 W – 200 W
72 W – 102 W
Less than 72 W
102 W – 200 W
72 W – 102 W
Less than 72 W
102 W – 200 W
72 W – 102 W
Less than 72 W
WARNING
—
These devices are designed to be operated at lethal voltages and energy levels. Circuit
designs that embody these components must conform with applicable safety requirements. Precau-
tions must be taken to prevent accidental contact with power-line potentials. Do not connect
grounded test equipment.
The use of an isolation transformer is recommended during circuit development and breadboarding.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
™
S
ERIES
STR-B5050
FLUORESCENT-LAMP
INVERTER BALLAST
Timing Charts
