MC33167 查看數據表（PDF） - Motorola => Freescale
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MC33167 Datasheet PDF : 16 Pages
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Oscillator
PWM
Thermal
3
MC34167 MC33167
Figure 24. Triple Output Converter
Vin
24 V
ILIMIT
S
Q
R
UVLO
4
+
1000
2
1N5825
Reference
+
EA
+
1
T1
6.8 k
+
1000
MUR110
+
VO3
1000 –12 V/200 mA
MUR110
+1000
VO2
12 V/250 mA
VO1
5.0 V/3.0 A
5
0.1
68 k
Tests
Conditions
Results
Line Regulation
5.0 V
12 V
–12 V
Vin = 15 V to 30 V, IO1 = 3.0 A, IO2 = 250 mA, IO3 = 200 mA
3.0 mV = ± 0.029%
572 mV = ± 2.4%
711 mV = ± 2.9%
Load Regulation
Output Ripple
Short Circuit Current
5.0 V
12 V
–12 V
5.0 V
12 V
–12 V
5.0 V
12 V
–12 V
Vin = 24 V, IO1 = 30 mA to 3.0 A, IO2 = 250 mA, IO3 = 200 mA
Vin = 24 V, IO1 = 3.0 A, IO2 = 100 mA to 250 mA, IO3 = 200 mA
Vin = 24 V, IO1 = 3.0 A, IO2 = 250 mA, IO3 = 75 mA to 200 mA
Vin = 24 V, IO1 = 3.0 A, IO2 = 250 mA, IO3 = 200 mA
Vin = 24 V, RL = 0.1 Ω
1.0 mV = ± 0.009%
409 mV = ±1.5%
528 mV = ± 2.0%
75 mVpp
20 mVpp
20 mVpp
6.5 A
2.7 A
2.2 A
Efficiency
TOTAL
Vin = 24 V, IO1 = 3.0 A, IO2 = 250 mA, IO3 = 200 mA
84.2%
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 – 69 turns of #26 AWG
T1 = Secondary: VO3 – 104 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:
+ ǒ )) Ǔ # TURNS(SEC)
VO(SEC) VF(SEC)
VO(PRI) VF(PRI)
#TURNS(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.
MOTOROLA ANALOG IC DEVICE DATA
11
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