MAX13253 Datasheet, PDF (6/14 Pages) Maxim Integrated Products – 1A, Spread-Spectrum, Push-Pull, Transformer Driver for Isolated Power Supplies

MAX13253
1A, Spread-Spectrum, Push-Pull, Transformer
Driver for Isolated Power Supplies
Typical Operating Characteristics (continued)
(V_DD = +5V, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
90
TA = +25°C
88
86
TA = -40°C
84
82
80
78
0
TA = +85°C
CLK = GND
TA = +125°C
HICLK = GND
SPRD = GND
1:1:1.3:1.3
HALO TGM-H240V8LF
TRANSFORMER
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
95
HICLK = GND
90
85
HICLK = VDD
80
CLK = GND
SPRD = GND
75 _1:1:1.3:1.3
HALO TGM-H240V8LF
TRANSFORMER
70
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
95
VDD = 5.5V
90
85
VDD = 5V
80 CLK = GND
VDD = 4.5V
HICLK = GND
SPRD = GND
75 1:1:1.3:1.3
HALO TGM-H240V8LF
TRANSFORMER
70
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
95
TA = -40°C
90
TA = +25°C
85
TA = +85°C
80 CLK = GND
HICLK = GND
SPRD = GND
TA = +125°C
75 1:1:2:2
HALO TGM-H260V8LF
TRANSFORMER
70
0 0.1 0.2 0.3 0.4 0.5 0.6
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
95
HICLK = GND
90
85
HICLK = VDD
80
75 CLK = GND
SPRD = GND
70
1:1:2:2
HALO TGM-H260V8LF
TRANSFORMER
65
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
LOAD CURRENT (A)
EFFICIENY vs. LOAD CURRENT
95
VDD = 3.6V
90
VDD = 3.3V
85
VDD = 3.0V
80
CLK = GND
75 HICLK = GND
SPRD = GND
70
1:1:2:2
HALO TGM-H260V8LF
TRANSFORMER
65
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
LOAD CURRENT (A)
SWITCHING WAVEFORMS
MAX13253 toc14
T1
5V/div
0V
CLK = GND SPRD = GND
HICLK = GND RLOAD = 1kΩ
1µs/div
T2
5V/div
0V
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