MAX8730 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8730 Datasheet PDF : 29 Pages
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Low-Cost Battery Charger
Typical Operating Characteristics (continued)
(Circuit of Figure 1, adapter = 19.5V, VBATT = 12V, VICTL = 2.4V, MODE > 1.8V, REFON = INPON = LDO, VRELTH = VREF/2, TA =
+25°C, unless otherwise noted.)
OUTPUT RIPPLE VOLTAGE
vs. BATTERY VOLTAGE
0.18
SWITCHING FREQUENCY
vs. BATTERY VOLTAGE
1000
0.15
800
0.12
0.09
600
0.06
400
0.03
0
0
5
10
15
20
BATTERY VOLTAGE (V)
200
0
3 6 9 12 15 18
BATTERY VOLTAGE (V)
BATTERY REMOVAL
MAX8730toc12
CHARGE
CURRENT = 12V
COUT = 4.7µF
COUT = 10µF
13V
12.5V
4µs/div
ADAPTER
PDS
PDL
SYSTEM
LOAD
ADAPTER INSERTION
MAX8730toc13
20V
ADAPTER
INSERTION
0V
20V
0V
20V
0V
20V
0V
100µs/div
ADAPTER
PDS
PDL
SYSTEM
LOAD
ADAPTER REMOVAL
MAX8730toc14
BATTERY
VOLTAGE = 16.8V 20V
0V
20V
0V
20V
0V
20V
0V
4ms/div
LOAD
CURRENT
ADAPTER
CURRENT
INDUCTOR
CURRENT
COMPENSATION
SYSTEM LOAD TRANSIENT
MAX8730toc15
CCS
CCI
CCI
CCS
200µs/div
5A
0A
5A
0A
5A
0A
500mV/div
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