L6917 STMicroelectronics, L6917 Datasheet - Page 28

• Manufacturer Part Number: L6917
• Description: 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER
• Manufacturer: STMicroelectronics

L6917B
Part List (continued)
Efficiency
Figure 24 showes the system efficiency for output current ranging form 5A up to 50A.
Figure 24. Efficiency (f
28/33
C2
C3, C4
C5, C6, C7, C8
C9, C10
C11 to C13
C14 to C23
Ca
L1, L2
U1
Q1,Q1a, Q3,Q3a
Q2, Q4
D1, D2
D3, D4
osc
47n
100n
1
10
1800 / 16V
2200 / 6.3V
68n
0.5
L6917B
SUB85N03-04P
SUB70N03-09BP
STPS340U
1N4148
= 200kHz; Vout = 1.7V)
89
87
85
83
81
79
77
75
0
5
10
15
Output Current [A]
20
25
Ceramic
Ceramic
Ceramic
Rubycon MBZ
Rubycon MBZ
77121 Core – 3 Turns
STMicroelectronics
Vishay - Siliconix
Vishay - Siliconix
STMicroelectronics
STMicroelectronics
30
35
40
45
50
55
SMD 0805
SMD 0805
SMD 1206
SMD 1206
Radial 10x10.5
Radial 10x10.5
SMD 0805
SO28
D
D
SMB
SOT23
2
2
PACK
PACK