HR41-2812 Datasheet, PDF (2/6 Pages) Crane Aerospace & Electronics. – DC/DC CONVERTERS 28 VOLT INPUT

HR40 SERIES
4 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 32 VDC
Output Power
• 3.2 to 4 watts depending on model
Lead Soldering Temperature (10 sec)
• 300°C
Storage Temperature Range (Case)
• –40°C to +125°C
DC/DC CONVERTERS
INHIBIT
Inhibit TTL Open Collector
• Logic low (output disabled) ≤ 0.8 V
• Referenced to input common
• Logic high (output enabled) ≥ 12 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 32 VDC continuous
• 40 V for 50 ms transient
Case Operating Temperature (Tc)
• –40°C to +85°C full power
• –40°C to +105°C absolute
Derating Output Power/Current
• Linearly from 100% at 85°C to 0% at 105°C
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• HR41-2805 100 ppm/°C typ, 200 max.
• HR42-28XX 50 ppm/°C typ.
• HR43-28XX 100 ppm/°C typ.
Input to Output Capacitance
• 60 pF typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• Single and dual output models, 80 kHz at
full load typical, variable frequency
• Triple output models, 200 kHz typical
fixed frequency
Inhibit Pin Voltage (unit enabled)
• 12 to 28 V
WARNING: EXTERNAL CAPACITORS REQUIRED
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE AND DUAL OUTPUT MODELS
PARAMETER¹
CONDITIONS
HR41-2805
MIN TYP MAX
HR42-2812
MIN TYP MAX
HR42-2815
MIN TYP MAX
UNITS
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER²
P_OUT = 2 W
18 TO 32 V_IN
Tc = –40°C TO +85°C
4.90 5.0 5.10
—
— 700
—
— 3.5
±11.88
—
—
±12 ±12.12
— ±167
— 4.0
±14.85
—
—
±15 ±15.15
— ±133
— 4.0
VDC
mA
W
OUTPUT RIPPLE
BW = 1 MHz
—
75 150
—
75 150
—
75 150 mV p-p
LINE REGULATION
LOAD REGULATION
18 - 32 V_IN, P_OUT = 2 W
—
5
10
NO LOAD TO FULL
—
25
50
—
10 20
—
12 24
—
10 20
mV
—
12 24
mV
INPUT VOLTAGE
Tc = –40°C TO +85°C
16
28
32
16
28 32
16
28 32
VDC
TRANSIENT 50 ms
—
—
40
—
— 40
—
— 40
V
INPUT CURRENT
NO LOAD
—
7
10
—
10 15
—
10 15
FULL LOAD
—
— 192
—
— 213
—
— 213
mA
INHIBITED
—
—
15
—
— 15
—
— 15
EFFICIENCY
FULL LOAD
68
72
—
70
75 —
70
75 —
%
Notes
1. External capacitors required to prevent damage to internal circuitry (see
Table 1 for specifications).
2. Dual output models deliver up to 4 watts total for balanced or unbalanced
loads, however, the positive output should carry at least 25% of the total load.
SINGLE AND DUAL OUTPUT EXTERNAL CAPACITORS
OPERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY.
TABLE 1: EXTERNAL CAPACITOR REQUIREMENTS
Model
Single Output
HR41-2805
Dual Outputs²
HR42-2812
and
HR42-2815
Required
Connection
Positive Output (12 & 13) to
Output Common (8 & 9)
Positive Output (10) to
Output Common (8)
External Capacitor (14) to
Output Common (8)³
Negative Output (12) to
Output Common (8)
Minimum
Capacitor Value¹
220 µF, 10 V
100 µF, 25 V
100 µF, 25 V
10 µF, 25 V
Table 1 Notes
1. Capacitors should be high quality, low ESR components —
solid tantalum is recommended.
2. See Figure 1 for connection diagram
3. Place positive side of capacitor toward pin 8.
POSITIVE
INPUT
1, 2
INHIBIT
15
17, 18
INPUT
COMMON
FEEDBACK
LOGIC
TIMING
CONTROL
SWITCH
POSITIVE
OUTPUT
10
+ _OUTPUT
COMMON
8
+
NEGATIVE
VOLTAGE
OUTPUT
12
REGULATOR
EXTERNAL
CAPACITORS
100µF
+
10µF
100µF
14
EXTERNAL
CAPACITOR
TERMINAL
FIGURE 1: DUAL OUTPUT EXTERNAL CAPACITOR CONNECTIONS
B4-52