参数资料
型号: MC33166
厂商: ON SEMICONDUCTOR
元件分类: 基准电压源/电流源
英文描述: RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述: 抗辐射高效,5安培开关稳压器
文件页数: 11/16页
文件大小: 403K
代理商: MC33166
MC34166 MC33166
11
MOTOROLA ANALOG IC DEVICE DATA
Figure 24. Triple Output Converter
4
2
1
5
3
+
VO1
5.05 V/2.0 A
EA
Reference
Thermal
Oscillator
S
R
Q
PWM
UVLO
ILIMIT
Vin
24 V
1000
+
6.8 k
68 k
0.1
1N5822
+
1000
1000
+
1000
+
MUR110
MUR110
VO3
–12 V/100 mA
VO2
12 V/300 mA
T1
+
+
Tests
Conditions
Results
Line Regulation
5.0 V
12 V
–12 V
Vin = 15 V to 30 V, IO1 = 2.0 A, IO2 = 300 mA, IO3 = 100 mA
4.0 mV =
±
0.04%
450 mV =
±
1.9%
350 mV =
±
1.5%
Load Regulation
5.0 V
12 V
–12 V
Vin = 24 V, IO1 = 500 mA to 2.0 A, IO2 = 300 mA, IO3 = 100 mA
Vin = 24 V, IO1 = 2.0 A, IO2 = 100 mA to 300 mA, IO3 = 100 mA
Vin = 24 V, IO1 = 2.0 A, IO2 = 300 mA, IO3 = 30 mA to 100 mA
2.0 mV =
±
0.02%
420 mV =
±
1.7%
310 mV =
±
1.3%
Output Ripple
5.0 V
12 V
–12 V
Vin = 24 V, IO1 = 2.0 A, IO2 = 300 mA, IO3 = 100 mA
50 mVpp
25 mVpp
10 mVpp
Short Circuit Current
5.0 V
12 V
–12 V
Vin = 24 V, RL = 0.1
4.3 A
1.83 A
1.47 A
Efficiency
TOTAL
Vin = 24 V, IO1 = 2.0 A, IO2 = 300 mA, IO3 = 100 mA
83.3%
T1 = Primary: Coilcraft M1496-A or General Magnetics Technology GMT–0223, 42 turns of #16 AWG on Magnetics Inc. 58350-A2 core.
T1 =
Secondary: VO2 — 65 turns of #26 AWG
T1 = Secondary:
VO3 — 96 turns of #28 AWG
Heatsink = AAVID Engineering Inc. 5903B, or 5930B.
Multiple auxiliary outputs can easily be derived by winding secondaries on the main output inductor to form a transformer. The secondaries must be connected so that
the energy is delivered to the auxiliary outputs when the Switch Output turns off. During the OFF time, the voltage across the primary winding is regulated by the feedback
loop, yielding a constant Volts/Turn ratio. The number of turns for any given secondary voltage can be calculated by the following equation:
# TURNS(SEC)
VO(SEC)
VO(PRI)
#TURNS(PRI)
VF(SEC)
VF(PRI)
Note that the 12 V winding is stacked on top of the 5.0 V output. This reduces the number of secondary turns and improves lead regulation. For best auxiliary regulation,
the auxiliary outputs should be less than 33% of the total output power.
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