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参数资料
| 型号： | MC33342PG |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR BATTERY FAST CHRG 8DIP |
| 产品变化通告： | Product Obsolescence 14/Apr/2010 |
| 标准包装： | 50 |
| 功能： | 充电管理 |
| 电池化学： | 镍镉（NiCd）、镍金属氢化物（NiMH） |
| 电源电压： | 3.25 V ~ 18 V |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 其它名称： | MC33342PGOS |
MC33340, MC33342
11 ms Preset
Q
D
Q
22 ms Convert
Switch 2
Switch 3A
2 11
Test
2 5
Normal
Oscillator
760 kHz
÷ 2 3
÷ 2 6
÷ 2 2
÷ 2 3
÷ 2 1
÷ 2 5
÷ 2 8
÷ 2 2
÷ 2
÷ 2
÷ 2
÷ 2
Switch 3B
95 kHz
SCK to
Voltage to
Frequency
Converter
2 11
Switch 1
2 19
MC33340
Holdoff Time Signal
MC33342
t1/T ref High
t2/T sen
Time and Test Decoder
t3/T ref Low
Each test mode bypass switch is shown
in the proper position for normal charger operation.
Figure 11. Timer Functional Block Diagram
Fast/Trickle Output
R5
1.0 k
D3
IC1 MC33340 or MC33342 V CC
Undervoltage
8
C2
0.1
IC2
I Adj
2.4
1.8 k
R2 + R1
VBatt
Ichg(fast) +
F/T
SW3
AC
Line
Input
DC
Input
R6
D1
Charge
Status
1N4002
R2
D2
LM317
R1
R7
R8
220
D4
– 1
Vsen
Vref ) (IAdj R8)
R7
V sen
1
C1
0.01
V sen
Gate
2
3
Fast/
Trickle
2.0 V
1.0 V
Internal Bias
Voltage to
Frequency
Converter
Ck F/V R
High Over
Battery
Detect
Low Under
t1
? D V Detect
Counter
Timer t2
V sen
Gate
t3
t/T
Lockout
Over
Temp
R Latch
Q
S
Temp
Detect
Time/Temp
Select
V CC
2.9 V
Battery
Pack
30 m A t1/T ref High
7
SW1
30 m A t2/T sen
6
30 m A t3/T ref Low
5
V CC
0.6 V
R NTC
10 k
R3
SW2
R4
Ichg(trickle) +
Vin – Vf(D3) – VBatt
R5
Gnd
4
This application combines the MC33340/342 with an adjustable three terminal regulator to form an isolated secondary side battery charger. Regulator IC2
operates as a constant current source with R7 setting the fast charge level. The trickle charge level is set by R5. The R2/R1 divider should be adjusted so
that the V sen input is less than 2.0 V when the batteries are fully charged. The printed circuit board shown below will accept the several TO?220 style heat-
sinks for IC2 and are all manufactured by AAVID Engineering Inc.
Figure 12. Line Isolated Linear Regulator Charger
http://onsemi.com
10
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