Rainbow-electronics MAX783 Manual do Utilizador descarregar pdf (Página 11)

MAX783

Triple-Output Power-Supply Controller

for Notebook Computers

______________________________________________________________________________________ 11

SHOOT-

THROUGH

CONTROL

60kHz

LPF

MINIMUM

CURRENT

(IDLE-MODE)

25mV

LEVEL

SHIFT

1µs

SINGLE-SHOT

MAIN PWM

COMPARATOR

OSC

LEVEL

SHIFT

CURRENT

LIMIT

30R

3.3V

4µA

SYNCHRONOUS

RECTIFIER CONTROL

0mV–100mV

REF, 3.3V

(OR INTERNAL

5V REFERENCE)

SS_

ON_

-100mV

VDD REG

(SEE FIG. 2)

CS_

FB_

BST_

DH_

LX_

DL_

PGND

SLOPE COMP

MAX783

Figure 3. PWM Controller Block Diagram

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 27 28

Evaluation Kit 1
Information Included 1
ELECTRICAL CHARACTERISTICS 2
ABSOLUTE MAXIMUM RATINGS 2
MAX183 5 4
MAX183 6 4
+5V Switch-Mode Supply 8
+3.3V Switch-Mode Supply 8
HIGH-SIDE SUPPLY (VDD) 9
Figure 2. Block Diagram 10
High-Side Supply (VDD) 13
PCMCIA-Compatible 13
Programmable VPP Supplies 13
Table 2. VPP Program Codes 14
+5V Inductor (L1) 15
+3.3V Transformer (L2) 15
MOSFET Switches (N1-N4) 16
Diode D3 17
Diodes D2 and D5 17
Bypass Capacitors 17
Low-Voltage Operation 17
Layout and Grounding 18
Evaluation Kit Information 20
36-PIN PLASTIC 28
SMALL-OUTLINE 28

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